Forums/Z31P/z31-basics how-to-guides-basic/Upgrade to PRW-2 Ign. Control Module (Power Transistor Unit)
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Careless: (2012-06-05 14:49:48)
So this one is pretty simple. I'm not even going to post pics or wiring diagrams because the Z31 wiring is the same across all years in this modification as far as I'm aware. michaelp said he would take pictures next time he does the upgrade to a customer's car. So I didn't bother taking pics. Thanks to michaelp for some help in sourcing diagrams because I was lazyfaced.
This guide pertains to the following item, it has a number of names:
⢠Power Transistor Unit
⢠Ignition Control Module
⢠Ignitor Chip
⢠Ignition Transistor
It is the transistor that charges/discharges the Ignition Coil.
It can be found on a number of Distributor equipped Nissans
⢠Altima
⢠Sentra
⢠Pathfinder
⢠Maxima
⢠many others, I'm sure.
The one you will source looks like this:
(PRW-2, but there is also a similar looking PRW-1A)
[archived image: RwWYg.jpg]
On the Z31 harness located on your drive strut tower behind the headlight (where the main ignition components are), you will find your current PTU. It probably looks like this:
[archived image: 8ZhKF.png]
The issue with the newer PRW-2 is that there are two wires that have been flipped, or two contacts that need to be swapped on the Z31 harness.
The procedure is simple. All you need is one of these:
[archived image: ncPRC.jpg]
THE ONLY WIRES YOU ARE SWITCHING ARE THE BLACK and the GREEN/WHITE wires.
THE COMMON WIRE BETWEEN PRW-2 EQUIPPED CARS and Z31's IS THE BLUE WIRE. LEAVE THAT WHERE IT IS.
You must remove the black housing clip on the back of the z31 harness grey connector to expose the seals on the back of the wires. All you need to do back here is to be able to see the seals. You do not interact with the seals or poke them at all. You need to remove this black housing clip to be able to pull the wires out. That's all on this side.
Now insert the safety pin into the small rectangular hole just above the head of each of the contact pins from the INSIDE of the connector. You simply lay the pin flat on the top of the connector contact, and slide it in until it stops. Do not force it in. It will slide off. You simple slide the safety pin in until it stops, and gently pry downwards so the retainer inside the connector is moved up and away from the contact pin, while GENTLY tugging on the back of the wire. DO NOT try and use pin removal tools from generic tool kits or whatnot. They are too large, cumbersome, flimsy, thick, or not long enough and bottom out on the connector body.
It takes just a gentle pry and pull.
Once you remove the black wire and the green/white wire, just shove them back into the opposite sockets, and put the black connector back-housing onto the connector again to seal it all up. Drill some holes and weld some 5mm nuts onto your ignition coil bracket or just zip tie it down onto a piece of metal (it needs a heat sink to remain cool) and away you go.
You can refer to the pathfinder and the z31 PTU diagrams to see how the power transistor "collector", "emitter", and "base" terminals are wired up. michaelp might have them, I don't remember where I put them. But if you do decide to look at those diagrams, turn the Pathfinder one upside down to make it less confusing. Nissan changed the orientation of the connector locking tab so it may confuse or cause you to wire it up incorrectly and get no ignition at all.
Things you might experience from doing this mod:
⢠improved ignition response (immediately noticed this)
⢠improved idle
⢠improved timing control/stability (immediately noticed this)
⢠improved coil saturation/discharge
⢠improved improvements.
I know I experienced at least 7 out of the possible 5 I've listed there.
Enjoy, and happy ch00ning.
edicer2: (2012-06-05 15:10:54)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
what years for those models? I am interested in trying this!
I think i found it on rockauto -55.89$+shipping or does it need to be a authentic nissan one?
this it? Its listed under a 92 pathfinder as a "Distributor Transistor Unit" under ignition.
Careless: (2012-06-05 17:39:45)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
i would just go to the junkyard and get one. im not sure what years. you're bound to find one in some form of early 90's nissan there for sure.
MADMIKE: (2012-06-05 19:35:10)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Are these supposed to be better than the later style z31 PTUs
[archived image: power-transistor_88-89.jpg]
862sik: (2012-06-05 19:55:37)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Yea im courious as to what makes this better. It just sees the distribitor and pulses on and off right? SO whats so different with the new one?
michaelp: (2012-06-05 23:10:53)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
The distributor doesnt control the coil, the ECU does…and the ECU grounds/ungrounds the coil with this (PTU). The PRW-2 is a faster responding and more reliable, more modern, transistor.
A friend actually told me about how he tried this some time ago, but I'm not sure what his s/n is on here these days.
862sik: (2012-06-05 23:25:17)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]michaelp wrote:
Yea im courious as to what makes this better. It just sees the distribitor and pulses on and off right? SO whats so different with the new one?
The distributor doesnt control the coil, the ECU does…and the ECU grounds/ungrounds the coil with this (PTU). The PRW-2 is a faster responding and more reliable, more modern, transistor.
A friend actually told me about how he tried this some time ago, but I'm not sure what his s/n is on here these days.
Ah lol…I was thinking CAS thanks for the correction.
I see now, faster responding.....I wonder how it actually feels on the road. Ill probably do it soon and then right after, reconnect my blaster coil.
michaelp: (2012-06-06 00:14:40)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
My 86T's "surge" at ~3k was fixed by swapping to this PTU....I had tried multiple different Z31 PTUs, including the 88-89 style, and it still had the surge with them....throttle response is also improved and it pulls harder…
G-E: (2012-06-06 00:30:02)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Awesome!
BTW the '93 pathy has these on a bracket on the plenum iirc
Careless: (2012-06-06 01:04:46)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]michaelp wrote:
Yea im courious as to what makes this better. It just sees the distribitor and pulses on and off right? SO whats so different with the new one?
The distributor doesnt control the coil, the ECU does…and the ECU grounds/ungrounds the coil with this (PTU). The PRW-2 is a faster responding and more reliable, more modern, transistor.
A friend actually told me about how he tried this some time ago, but I'm not sure what his s/n is on here these days.
domdogg23 or something. he messaged me long ago but his post was super long and in the end, I don't think it was as simple as "reverse the wires that aren't blue". LOL.
michaelp: (2012-06-06 06:08:11)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Careless wrote: [quote=michaelp]
Yea im courious as to what makes this better. It just sees the distribitor and pulses on and off right? SO whats so different with the new one?
The distributor doesnt control the coil, the ECU does…and the ECU grounds/ungrounds the coil with this (PTU). The PRW-2 is a faster responding and more reliable, more modern, transistor.
A friend actually told me about how he tried this some time ago, but I'm not sure what his s/n is on here these days.
domdogg23 or something. he messaged me long ago but his post was super long and in the end, I don't think it was as simple as "reverse the wires that aren't blue". LOL.
Nope, thats not who I know who did it.
Careless: (2012-06-06 07:05:24)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
doesn't matter. :langue
edicer2: (2012-06-06 20:46:08)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
just bought two…one for the 86na and one for the 87t!
NissanEgg: (2012-06-06 23:15:59)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Looks similar to the B13 SR20 and GA16 versions.
jono794: (2012-06-06 23:25:35)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I believe the Standard number is LX748.
Careless: (2012-06-07 03:37:00)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
That's what mine came off of.
As an indication of how well my car runs.
I was getting spark cut-out before swapping distributors and ignitors and getting code 21.
Now I drove the HE351 and it pulled like a freight train. It's 9:1 with a 60mm turbo and BCPR6ES plugs gapped to .035. And it didn't cut out at all, and I don't even know what my timing is set at. I eyeballed what looked like 15. LOL.
Was it the ignitor? Possibly has something to do with spark delivery. My car was blowing out spark last time, so its possible.
MuhKaydenZ: (2012-06-07 07:35:43)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I'm going to go pick up some tomorrow to put on both my cars [archived image: smile.png]
michaelp: (2012-06-07 17:46:11)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
BWD: http://shop.advanceautoparts.com/webapp … EAMS_____#
Beck/Arnley: http://shop.advanceautoparts.com/webapp … NEAMS_____
I need to trim the bracket down some, or make a new one.
michaelp: (2012-06-07 17:48:30)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Interchange:
INFINITI M30 (1990 - 1991)
NISSAN ALTIMA (1993 - 1997)
NISSAN AXXESS (1990 - 1992)
NISSAN D21 PICKUP (1990 - 1994)
NISSAN MAXIMA (1989 - 1994)
NISSAN NX (1991 - 1993)
NISSAN PATHFINDER (1987 - 1995)
NISSAN PICKUP (1995 - 1996)
NISSAN PULSAR NX (1989 - 1990)
NISSAN SENTRA (1989 - 1994)
NISSAN STANZA (1990 - 1992)
NissanEgg: (2012-06-07 17:51:55)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
For the Sentra/NX, is it the GA16, the SR20, or both? For the D21, is the KA or VG, or both?
michaelp: (2012-06-07 17:59:53)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]NissanEgg wrote:
Interchange:
INFINITI M30 (1990 - 1991)
NISSAN ALTIMA (1993 - 1997)
NISSAN AXXESS (1990 - 1992)
NISSAN D21 PICKUP (1990 - 1994)
NISSAN MAXIMA (1989 - 1994)
NISSAN NX (1991 - 1993)
NISSAN PATHFINDER (1987 - 1995)
NISSAN PICKUP (1995 - 1996)
NISSAN PULSAR NX (1989 - 1990)
NISSAN SENTRA (1989 - 1994)
NISSAN STANZA (1990 - 1992)For the Sentra/NX, is it the GA16, the SR20, or both? For the D21, is the KA or VG, or both?
Not 100% sure, just copied it off rock auto....I'd say check those and confirm its PRW-2 before buying.
Careless: (2012-06-07 19:24:58)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I advise not buying a 3rd party unit.
Buy OEM, because 3rd party manufacturers believe that a transistor is a transistor is a transistor is a transistor.
they may have "close enough" specs, but just get a PRW-2 at the JY and you'll have a genuine nissan part for less than a 3rd party unit.
MuhKaydenZ: (2012-06-07 19:29:54)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I have highly considered sending you a camera so we don't have to suffer from blurry pics lol I do appreciate all you do though thanks!
Careless: (2012-06-07 19:42:18)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]MuhKaydenZ wrote:
BWD: http://shop.advanceautoparts.com/webapp … EAMS_____#
Beck/Arnley: http://shop.advanceautoparts.com/webapp … NEAMS_____
I need to trim the bracket down some, or make a new one.
I have highly considered sending you a camera so we don't have to suffer from blurry pics lol I do appreciate all you do though thanks!
it's ok, mike did a poor job on that bracket anyway :nanan?re
I'll take pics when I put my bracket on tonight.
michaelp: (2012-06-07 20:22:32)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Careless wrote: [quote=MuhKaydenZ]
BWD: http://shop.advanceautoparts.com/webapp … EAMS_____#
Beck/Arnley: http://shop.advanceautoparts.com/webapp … NEAMS_____
I need to trim the bracket down some, or make a new one.
I have highly considered sending you a camera so we don't have to suffer from blurry pics lol I do appreciate all you do though thanks!
it's ok, mike did a poor job on that bracket anyway :nanan?re
I'll take pics when I put my bracket on tonight.
Its a stock pathfinder bracket…lol
I have a better camera, but I don't carry it around all the time…so I use my cell phone most of the time, and it takes poopy pictures.
edicer2: (2012-06-07 20:39:16)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
here is where I got my two… looks like there are 2 left
http://www.ebay.com/itm/89-95-NISSAN-MA … c5&vxp=mtr
MuhKaydenZ: (2012-06-08 00:18:37)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Just did this upgrade swap on both my Z's the 84 n/a had some noticeable improvement but my 86 VG33 swapped turbo ran quite a bit better thank you for showing us this swap! Highly recommended cheap easy upgrade!
jono794: (2012-06-08 01:56:26)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Looks like Bosch sell the PRW-2 stamped unit as well, their part number is BIM091.
Andrevas: (2012-06-08 09:55:32)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
did some searching, looks like the PRW-2 transistor is currently Nissan part # 22020-56E16
list of cars it's found on: http://www.nissanpartszone.com/Page_Pro … 2020-56E16
to answer a question, for the Sentra, it's for the GA16 only. for the D21, VG only.
the other PTU is part # 22020-53J20.
used to be 22020-56E11 for all of these models (what it states here and on lookup at any dealer's TradeMotion catalog): http://www.nissanpartszone.com/Page_Pro … 2020-56E11
22020-53J20 also fits 91-94 SR20 powered vehicles (Sentra/NX/G20).
Careless: (2012-06-08 15:05:25)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
everybody gets a PRW-2!
edicer2: (2012-06-08 15:27:40)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
^ LOL..i am a little excited to see the difference if any on either of my z when they get here!
Kutakino: (2012-06-08 18:02:09)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Neat, picking one up soon to see if it makes a difference.
biggz31: (2012-06-10 20:11:10)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
- modo
Dr. Pepper PhD.: (2012-06-12 16:59:04)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Damn, with the feedback about this, I may end up doing this swap on my SS. (Even though its not factory [archived image: frown.png] ) For 16 bucks shipped that ebay seller makes it not worth going to a yard for me.
Careless: (2012-06-12 18:12:48)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
you can make a conversion harness by cutting the connector off an existing PTU and splicing it into another harness connector, which you can pillage from multiple places in the engine bay of a parts car so you can swap back and forth if you really want :-)
G-E: (2012-06-12 18:44:20)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Careless wrote:
Damn, with the feedback about this, I may end up doing this swap on my SS. (Even though its not factory [archived image: frown.png] ) For 16 bucks shipped that ebay seller makes it not worth going to a yard for me.
you can make a conversion harness by cutting the connector off an existing PTU and splicing it into another harness connector, which you can pillage from multiple places in the engine bay of a parts car so you can swap back and forth if you really want :-)
I made an adapter harness just yesterday heheh, no need to cut off anything from a ptu, just get the right male/female parts from a harness
Careless: (2012-06-12 20:31:23)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I thought all the harness connectors had female sockets. Guess not! Cool beans.
I'm not sure if this thing has to do with me not getting spark blow-out with the 60mm turbo and 0.035 BCPR6ES's.
we'll see. car revs to the moon now- though.
Dr. Pepper PhD.: (2012-06-12 20:52:13)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I said hell with it and ordered one. I cannot imagine that there is a downside to them, hell if it runs better it probably gets better mileage too.
edicer2: (2012-06-12 21:14:58)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
yeah im waiting for my second one to show up so i can do both the same time.
Parker: (2012-06-12 23:25:56)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Careless, just out of curiosity, how did you discover this upgrade?
G-E: (2012-06-13 00:06:45)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I always wondered about this pwr unit since I saw it on a pathfinder, but never imagined it helped in a meaningful way
Careless: (2012-06-13 02:40:26)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
As stated in the original post, michaelp tipped me off about it, but he never posted about it. You can all thank him, credit where it's due.
I got one for free from a parted out sentra with a GA16 that my old landlord took to pieces. Another member posted about it a long time ago and said it improved idle/ignition response, but his PM to me was not as simple as "flip two wires", which is really all that is required aside from using the bracket or making a new one.
michaelp mentioned that along with my distributor, I should attempt the swap- and it's given my car new life (along with the distributor). So I thought I would post it.
Kingman: (2012-06-13 03:35:51)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I've got an ever-so-slight surge when cruising/light throttle that's been there for a loooong time, I'm wondering if it's in fact my stock TBI '88 Pathfinder PTU with 210K miles I'm using. It's different than the '90+ MPFI PTUs.
There's plenty of 4-doors in the junkyards around here, I'm going to pick one up and see how it does. Looking forward to it actually! The surge only annoys me because I tend to notice silly stuff that no one else does. A buddy of mine noticed as well but only after I made him focus on it and pick it out specifically.
Hope it works as well for me as everyone else. Good shit!
edicer2: (2012-06-13 05:09:29)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Here is my install…i am going to paint the bracket sometime too so it looks better.
Careless: (2012-06-13 06:05:29)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I will say my engine has a slight miss at idle. but that's definitely not an ignition issue as code 21 has not cropped up anymore.
i mean, if it is an ignition issue, it's based on spark plug wires or plugs- but i have a feeling i have a shitty injector.
other than that- the car is a lot more responsive, so I dunno. maybe butt dyno. but since they're easily available in junkyards, it makes sense to just "procure" one (see: pillage) from another vehicle that is more common than a z31 if you really need a replacement.
Parker: (2012-06-13 13:36:16)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Sorry man, I guess I skimmed over that part.
I'm imagining some bored Z31 evil genius going through every component of the ignition/intake/powertrain/exhaust and determining where the weakest link is, upgrading there, then determining the new weakest link, upgrade THERE, etc. I guess it's not always that organized, and more of a "hey, this part is compatible so let's try it there and see if it improves anything" trial-and-error process. It makes sense I guess, since that's how we evolve. Now I'm wondering how many VG3x's have been sacrificed to the God of Performance Gains in the name of "this fits, let's see if it works." :-D
Anyhoo, thanks for reposting the info, and thanks to michaelp for the original find!
Careless: (2012-06-13 15:08:51)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
The simplicity in the discovery of this modification is thanks to Nissan as well.
On a fuel pump circuit, they will show you + and - terminals with a "F" in the middle for "Fuel Pump" or something.
On the PTU circuit for both the Z31 and Pathfinder, it shows the Collector, Base, and Emitter terminals for the transistor inside the unit, so figuring out which wires to swap was fairly easy when both diagrams were oriented in the same viewing direction. I would say that there are many other things in the FSM that are quite as easy, but they are not as well detailed internally as the PTU diags are.
michaelp: (2012-06-13 15:18:13)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
distortionfile was the name of the person on here who told me about this years ago…and I didn't believe it until I tried it myself. The ONLY reason he did it is because he had a pathfinder one and needed a PTU....
Careless: (2012-06-13 17:00:42)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
riiiiiight. thats who sent it to me too. meh. he should have posted.
Dave-D: (2012-06-15 13:22:27)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Just ordered one off of e-bay as well. Interested to see if it makes a difference…
My car just doesn't seem to want to start in the morning (ALWAYS on the second crank, fine the rest of the day) and it has a slight lope at idle.
Also hoping to see an increase in pep on take off (But is is a NA so I'm being realistic on my hopes for that one) HaHa! :lol:
michaelp: (2012-06-15 13:27:27)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
The cranking and idling issue is more likely the CHTS than anything else.
Dave-D: (2012-06-15 13:34:27)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]michaelp wrote:
Just ordered one off of e-bay as well. Interested to see if it makes a difference…
My car just doesn't seem to want to start in the morning (ALWAYS on the second crank, fine the rest of the day) and it has a slight lope at idle.
Also hoping to see an increase in pep on take off (But is is a NA so I'm being realistic on my hopes for that one) HaHa! :lol:
The cranking and idling issue is more likely the CHTS than anything else.
I have installed a new CHTS and Subharness from Nissan and it did make a huge difference But I still have a small cold start issue
michaelp: (2012-06-15 13:52:51)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Dave-D wrote: [quote=michaelp]
Just ordered one off of e-bay as well. Interested to see if it makes a difference…
My car just doesn't seem to want to start in the morning (ALWAYS on the second crank, fine the rest of the day) and it has a slight lope at idle.
Also hoping to see an increase in pep on take off (But is is a NA so I'm being realistic on my hopes for that one) HaHa! :lol:
The cranking and idling issue is more likely the CHTS than anything else.
I have installed a new CHTS and Subharness from Nissan and it did make a huge difference But I still have a small cold start issue[/quote:13rdk6a1]
84-85 ECUs have issues with that, get a 87NA ECU.
Careless: (2012-06-15 14:38:14)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
take this CHTS discussion to PM's.
this is a PTU installation how-to.
edicer2: (2012-06-15 16:20:40)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I did it on my 86na will post pics soon…also used the old ptu bracket and mounting location.
Kutakino: (2012-06-16 23:38:23)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Just got mine installed and mounted. I wasn't having much luck with the pin, as it kept bending instead of prying on the pin retainer. I had much better luck with one of those super tiny flathead screwdrivers for eyeglasses and such. Very easy to do though, I zip-tied mine to my un-used AIV bracket (the one with the three holes), the holes in the PRW-2 almost line up with the 2 holes that are furthest apart, so it sits nice and snug.
As far as results, I have a more stable cold-start idle, less bumpiness and no threatening to stall anymore. Immediately noticed quicker throttle response, and there's less popping as it comes down from revving. It feels like there's a little more power now, but that could just be wishful thinking. The idle is smoother driving around town as well. Overall, I think the results definitely justify the very small amount of time and money that goes into this mod.
Dave-D: (2012-06-18 23:07:38)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
OK mine came in the mail from the e-bay seller mentioned earlier in the thread..That was really fast.
I had a difficult time getting the pin to release the wires so instead I cut and spliced the two wires to each other. (green to black and black to green). Soldiered them and heat shrunk each wire and then wrapped them all in electrical tape to be covered in a short bit of wire loom. All said a 5 minute job..after the soldiering gun heated up.
I also zipped it to that three hole empty Bracket on the fender....
The results....
Well the car fired right up and ran fine no noticeable difference around the neighborhood. It might be a bit more peppy, but it could also be my imagination, so I will have to wait and see if there's a difference tomorrow morning on a cold start and a day of driving around town.
EDIT: Fired up this morning just a bit easier than normal. She usually starts on the second crank. Today she started on the first. But it could be a fluke, she also felt "peppier" today but again that's not really a very scientific observation, and it is only one day of observation. She did seem to idle smoother, the digital dash will fluctuate between 8k and 9k when sitting in traffic takes about a minute or so to see it happen. Today she sat pretty consistently at 8k. So is it making a difference? I don't know yet. But for the $16 I paid for the part its not like I'm worried about it. I also filled up today so we will see if it makes a difference in the MPGs as well.
Z_Karma: (2012-06-25 02:49:48)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Sticky this.
I installed one just now in my black 84T and noticed some of the benefits others have mentioned.
Noticeably smoother operation at low speeds like when cruising in 2nd through the residential
areas was the big thing. Normally it's kind of "lurchy" and i'd either coast or keep the RPM's up in 2nd gear.
Careless: (2012-06-25 03:23:45)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
i took my car out for a rip and to scare the neighbours yesterday. it definitely runs a lot better with this module and my refreshed 88T distributor.
upon flooring it up the street near the park, two middle-aged gents walked to the side of the road and awaited my return, so i floored it again on the way back and monitored my AFR's. it was around 12.5 under boost and the car was livid! and i heard a "wheeeeeeeeewwww wheeeeee!" from one of those doods. LULZ.
if i had a camera man, i woulda recorded it, but i does not has :-(
biggz31: (2012-06-27 13:19:54)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
http://www.ebay.com/itm/220419917329?ss … 1438.l2648
low price power transistor
Parker: (2012-06-27 13:42:21)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Mine just arrived yesterday. I was worried it wasn't going to be covered with junkyard writing, but never fear, someone had painted 1995 ALTIMA all over it with f**king nail polish or something. It's clean now. Didn't even have to pay customs on it!
Careless: (2012-06-27 14:47:26)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
acetone!
Careless: (2012-06-27 14:47:53)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
interesting… a 2A
never seen one of those befurr
Parker: (2012-06-27 15:30:03)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Yeah, I was able to scratch most of it off with my fingernail, then I used acetone to clean it up.
I just installed the PRW-2, and while I can't comment on performance under boost or even under load (waiting for parts to fix my clutch) but from revving it in my garage it sure sounded and felt smoother. It seeems to rev quicker, and when returning to idle it comes down smoothly and seems to hit idle immediately instead of dropping slightly below and revving back up a little. For what I paid and the amount of work required to install it, I'm happy with this even if I am just experiencing the placebo effect.
Only problem is the one I bought has half of the retaining clip broken off. It still plugs in and stays where it's supposed to, but I guess I'll have to buy another one for car shows. :lol: At least the broken clip goes well with my backyard butchery zip-tie installation.
Thanks guys!
Parker: (2012-06-27 16:04:32)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Hey, just out of curiosity, does anyone know how much of a heat sink this thing needs? I zip-tied it to the fender bracket where the AIV/boost sensor bracket used to be attached… think that'll be enough for now? As a permanent solution I'm probably going to get one of my welders to fab me a piece of 1/4" plate steel with holes to mount it to the fender bracket, and threaded holes to attach the ignitor.
[archived image: IMAG0251.jpg]
I just want to be sure I'm not going to damage this thing by letting it overheat the way it sits now. It is firmly seated against the bracket, and there's good airflow to most of the surface of the bracket, but the bracket itself doesn't have much mass to it.
michaelp: (2012-06-27 16:13:57)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Thats more than adequate there, its mounted to the intake manifold on pathfinders....which heatsoaks it a whole lot more than it will ever be in the Z31 stock location.
862sik: (2012-06-27 19:45:03)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
thats kinda how the nissan hadbody pickup is mounted to.
yesben13: (2012-06-29 00:31:43)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Got mine in today from the first ebay vendor that was posted in this thread. Installed it after work, used a blow gun dart to get the pins out, went easier then expected. Hope to notice some differences, thanks guys!
Gregmatic: (2012-06-29 03:43:54)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Put mine in tonight and holy crap what a difference. Idles wayy smoother and definitely pulls smoother to 6k. More power? Nah, not likely but the response and driveability is like night and day. Impressive…
Careless: (2012-06-29 03:52:01)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
ERRBODY THANK MICHAELPEE.
faaaaaaaaaaaaaanks miiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii iike
Axel kain: (2012-06-29 03:56:51)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Careless wrote:
distortionfile was the name of the person on here who told me about this years ago…and I didn't believe it until I tried it myself. The ONLY reason he did it is because he had a pathfinder one and needed a PTU....
riiiiiight. thats who sent it to me too. meh. he should have posted.
I'm glad this thread/ concept picked back up! I tried it after his mention, and in retrospect must have either gotten the wrong one or a dud. Cause it didn't work for me.
Time to find another ptu!!
jaqattack02: (2012-06-29 13:20:23)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Just ordered the PRW2A listed a little higher in the thread. For $10 it's worth a try.
biggz31: (2012-06-29 13:25:58)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
i also upgrade to prw-2 thanks to the one who make this possible [archived image: smile.png]
biggz31: (2012-06-29 13:30:05)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
good offer http://www.ebay.com/itm/89-97-Nissan…ef6077&vxp=mtr
Sharpen047: (2012-06-30 22:24:26)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Can anyone post pics on how to release the pin?
My contact just bends and doesnt release. spent about 30 mins 'gently' pulling the wire and theinsulation has pulled back and the metal inside is super soft.
Dave-D: (2012-06-30 23:42:49)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Same thing happened to me. I just cut and re-soldiered the wires. (See my other post above on page 4.)
862sik: (2012-07-01 00:31:15)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Dave-D wrote:
Can anyone post pics on how to release the pin?
My contact just bends and doesnt release. spent about 30 mins 'gently' pulling the wire and theinsulation has pulled back and the metal inside is super soft.
Same thing happened to me. I just cut and re-soldiered the wires. (See my other post above on page 4.)
Yeup much easier.
michaelp: (2012-07-01 00:45:24)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]862sik wrote: [quote=Dave-D]
Can anyone post pics on how to release the pin?
My contact just bends and doesnt release. spent about 30 mins 'gently' pulling the wire and theinsulation has pulled back and the metal inside is super soft.
Same thing happened to me. I just cut and re-soldiered the wires. (See my other post above on page 4.)Yeup much easier.
Cutting and resoldering the wires isnt much easier…it takes 10 seconds to pop the pins out of the Z31 PTU connector, then put them back in the right spots.
Careless: (2012-07-01 01:13:42)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
cutting and soldering the wires is not easier at all. once you release one pin, you will change your mind. you just gotta do it right at least once.
real talk.
Dave-D: (2012-07-01 02:49:15)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Yet it still works.
Careless: (2012-07-01 05:57:35)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
obviously it would work. no one disputed that.
it's just easier to swap pins than to heat up a soldering iron, cut back wiring, solder them properly, and put heatshrink or e-tape over them.
also when you solder a wire it becomes non flexible at that point. I hate that.
honestly using a safety pin or eye-glass repair screwdriver is the best thing to use, and i fucked with this connector for like 30 minutes until i just got a safety pin and it came out in 3 seconds.
there's nothing faster and easier, and soldering is totally unnecessary, and then if you ever want to change back, you gotta cut the wires again.
not cool.
MuhKaydenZ: (2012-07-01 08:18:19)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I had to destroy a similar unused connector to see how they came apart after that it was the quickest easiest upgrade I've ever done.
Dave-D: (2012-07-01 13:04:46)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Careless wrote:
Yet it still works.
obviously it would work. no one disputed that.
it's just easier to swap pins than to heat up a soldering iron, cut back wiring, solder them properly, and put heatshrink or e-tape over them.
also when you solder a wire it becomes non flexible at that point. I hate that.
honestly using a safety pin or eye-glass repair screwdriver is the best thing to use, and i fucked with this connector for like 30 minutes until i just got a safety pin and it came out in 3 seconds.
there's nothing faster and easier, and soldering is totally unnecessary, and then if you ever want to change back, you gotta cut the wires again.
not cool.
First off we can agree both ways work.
Just like Sharpen 047, I also fucked with the connector for about 30 minutes and was unsuccessful at releasing the pin. And I used several sizes of small screwdrivers,pins, finishing nails, ect. and pried in as many directions…(I was unsure as to which direction you specified in your write up.) So before I accidentally forced something and possibly broke it (which would require either a run to the JY or an auto parts store) I simply changed my tactics and broke out the soldering iron and finished the project.
I'm not a Professional Mechanic ok, but do have over 30 years of experience around cars. I'm not saying my ideas are correct or even the best way of adapting the plug but it is just ANOTHER way of doing it. I can see why your method is better, however there is nothing unsafe or dangerous in my alternate solution.
In the year I have owned my Z I have pretty much brought it back from the dead. Thanks to you guys here on Z31P. 8)
Sharpen047: (2012-07-01 17:24:21)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Yeah i ended up destroying the pin inside and now it slides back inside about 4mm and stops. its just thrashed. ive used pins screwdrivers safety pins small drill bits and even almost pulled the wire out of the head itself. nothing is working. i just want to see the connector when its out so i can make sure im doing it correctly.
i could solder it but id rather keep the harness intact. i can fix the pin when i get it out, but i cant get it out and right now dont have a car to drive.
Figured it would be "easy" enough to try and fix my code 21, possibly.
EDIT: ok got it. apparently someone has tried to change it before since mine was already messed up. but i got it by removing the back rubber piece and pushing the clip up.
only one pin was like that the other was easy.
FYI guys, the clip is plastic not metal.
G-E: (2012-07-01 20:48:27)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I've done this pin swapping for years, the nissan connectors are some of the easiest as you have next to no chance of screwing up the pins, only breaking the tabs like some people found out
SOME connectors have a retainer clip in the back that pops off, others slide out, whatever, the rubber grommet will not hold the wire in place so ignore it, all you need is a big needle to lift the tab away from the pin, but keep in mind the tab has a U shaped end, so push the wire at the back towards you before lifting the pin
Dave-D: (2012-07-01 22:23:57)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
THIS might be the critical piece of information that help those of us that have never done this before. I was only pulling gently. :banghead
G-E: (2012-07-02 05:22:38)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Haha yea, you lift the retainer gently and it won't break, something you can't do if it's still grabbing, I guess you got it now? [archived image: smile.png]
edicer2: (2012-07-02 17:58:31)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Dave-D wrote:
I've done this pin swapping for years, the nissan connectors are some of the easiest as you have next to no chance of screwing up the pins, only breaking the tabs like some people found out
SOME connectors have a retainer clip in the back that pops off, others slide out, whatever, the rubber grommet will not hold the wire in place so ignore it, all you need is a big needle to lift the tab away from the pin, but keep in mind the tab has a U shaped end, so push the wire at the back towards you before lifting the pin
THIS might be the critical piece of information that help those of us that have never done this before. I was only pulling gently. :banghead[/quote:3rlkp0l4]
yeah that might of helped me too ha i mangled my clip before i said fuck it and soldered it i was soldering stuff anyways so it wasnt a huge deal would of just looked cleaner to swap pins but after a hour of trying i said forget it.
FrozenZ: (2012-07-02 19:48:59)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Okay, so, I have a really dumb question. Not worried about pin removal, I work on guitar amps all the time so I'm used to funny pins. However, I have to ask about this goddamn yellow retaining clip that backs up the pins. What is the trick to this thing? :lol:
I don't want to just bust it off, and after fucking with it for ten minutes I am considering soldering the wires too (see comment re: guitar amps; actually, I am considering mini-spade connectors so I can A/B the two units rather than relying on the placebo effect!) There must be something I am missing here. It looks like you are supposed to compress the tabs on the "other" side in relation to this pic, and pull it out "this" side, but I can't get it to go. Am I just an idiot?
[archived image: rF8G0.jpg]
Z_Karma: (2012-07-02 20:05:30)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I made this for another thread a long time ago.
How to de-pin a Sumitomo/Yazaki connector:
After removing the strain relief, insert pin here:
[archived image: d6lUE.jpg]
and pry up.
Older connectors have a strain relief that when pried, slides out from the side (not the top as shown, its fucking animated, cut a brutha some slack)
Newer ones, when pried, pop out the rear of the connector.
Z_Karma: (2012-07-02 20:30:04)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Pry up here:
[archived image: 5Nrh3.jpg]
using a small flat blade (jewelers) screwdriver or straight pin.
The yellow strain relief part will slide up, but is probably stuck due to grit build up.
If it breaks (or the thin white piece of the plug body breaks) It's OK.
The crimp terminal retaining mechanism of the plug body is enough to
keep the terminal in place.
Careless: (2012-07-02 20:35:28)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
helpful stuff z-karma.
i have found that actually pushing the pin FORWARD from the back of the housing where the seals are will make prying up on the terminal tab easier. What I do is pinch the back of the wire with index and thumb of my left hand, and then push it in so my fingers are compressed against the housing, while holding it with my remaining 3 fingers on my left hand. this pushes the wire forward into the housing, i pry the tab upwards gently, and then squeeze the pinch a bit harder and it causes the wire to sliiiiiide out.
its a 3 second ordeal once you figure it out.
Axel kain: (2012-07-05 01:28:43)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Did the mod today. My brother snagged a pair. One is a prw-2 and the other is a prw-2a. Both tested fine. After I realized what I did wrong when distortionfile wanted me to try it years ago!! I swapped the 2 outside wires. Wrong! Checked the front page of this and realized my issue. Corrected, and tested both great! So im currently running the prw-2a!
My drive with it was nothing crazy, but it did seem to idle better.
Kingman: (2012-07-14 02:48:16)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Put a PRW2-a in it. Big difference!
Careless: (2012-07-14 03:08:46)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
what u mean?
Sprague84: (2012-07-14 13:26:54)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Ive got 4 prw-2 modules, pm me
Kingman: (2012-07-14 14:22:01)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Careless wrote:
Put a PRW2-a in it. Big difference!
what u mean?
Idles more stable and is a lot more responsive. If I was revving it in neutral with light throttle then stabbed it, it used to sputter a bit then catch up. Now it just zings right off.
Feels smoother when driving too and the lurching at low RPMS (idling down my driveway) lightened up a bit.
michaelp: (2012-07-14 14:28:34)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Kingman wrote: [quote=Careless]
Put a PRW2-a in it. Big difference!
what u mean?
Idles more stable and is a lot more responsive. If I was revving it in neutral with light throttle then stabbed it, it used to sputter a bit then catch up. Now it just zings right off.
Feels smoother when driving too and the lurching at low RPMS (idling down my driveway) lightened up a bit.
You mean your car. PRW-2 and PRW-2a do the same exact thing....lol
Kingman: (2012-07-14 14:41:17)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
…yes…
michaelp: (2012-07-14 14:56:39)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Just confirming that, because I think careless thought you were saying PRW-2 didnt work for you, but 2a did.
Careless: (2012-07-14 16:20:15)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]michaelp wrote:
…yes…
Just confirming that, because I think careless thought you were saying PRW-2 didnt work for you, but 2a did.
no mang… i was just wondering what the big difference was. what he experienced from swapping ignitors.
silverton: (2012-07-14 20:28:18)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I'm interested in doing this on my VG S12… but I don't understand WHAT it replaces. my car has something similar to this:
[archived image: power-transistor_88-89.jpg]
But wires go in to it from the harness, and out the other end of the transistor to the coil. I have a pathfinder plenum with this module on it, but it just plugs in to the harness, and a different plug from the harness goes to the coil.
Kingman: (2012-07-14 21:56:59)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Iz good shit man. That's the TBI Pathfinder style PTU. I may stick a PRW2 on my Pathfinder even though I don't have it anymore just to see if the sliiiiiight surge goes away.
862sik: (2012-07-14 22:22:36)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
The kouki z31 had the same style.
michaelp: (2012-07-15 01:31:27)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]862sik wrote:
Iz good shit man. That's the TBI Pathfinder style PTU. I may stick a PRW2 on my Pathfinder even though I don't have it anymore just to see if the sliiiiiight surge goes away.
The kouki z31 had the same style.
No it doesnt…it looks the same, on the transistor, but the wiring setup is completely different…and its all wired in with the coil too. My TBI Pulsar has the same crap. The Kouki's is still wired exactly the same as the zenki z31.
862sik: (2012-07-15 02:04:35)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]michaelp wrote: [quote=862sik]
Iz good shit man. That's the TBI Pathfinder style PTU. I may stick a PRW2 on my Pathfinder even though I don't have it anymore just to see if the sliiiiiight surge goes away.
The kouki z31 had the same style.
No it doesnt…it looks the same, on the transistor, but the wiring setup is completely different…and its all wired in with the coil too. My TBI Pulsar has the same crap. The Kouki's is still wired exactly the same as the zenki z31.
Really…mine "looks" like that
amreboot: (2012-07-16 03:54:55)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Here is my setup.
Its a complete assembly setup from a M30 including the black plastic cover.
The transistor is the PWR-2
manrossdamn: (2012-07-16 13:11:29)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Alright! I had gotten one from the junkyard a few weeks back thinking it was bad.
Got bored and tried again, works!
Noticed from the start, much peppier, quicker revs and smoother idle. Still has a miss and pop every once in a while. Not too bad though.
Is it bad that the bottom of the unit gets warm?
Haven't driven it around to see how much faster she feels yet
michaelp: (2012-07-16 13:37:29)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Thats a sweet setup, I was looking at my M30 and admiring the cover and crap....too bad they're so rare. :-(
manrossdamn: (2012-07-16 13:55:23)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
She's probably running rich.
Will do both of those sensors once I get the funds for timing belt/water pump and what not. [archived image: smile.png]
michaelp: (2012-07-16 13:58:03)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Rich doesn't cause the popping at idle…lean does.
amreboot: (2012-07-16 18:18:02)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
If I see another M30 and the junk yard, I will let you know.
silverton: (2012-07-16 18:49:48)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[archived image: 41IiIkzNTeL._SL500_AA300_.jpg]
This is what my power transistor set up is, I'm just going to assume that this PWR module is not a viable upgrade without modifying the chassis harness?
Sharpen047: (2012-07-16 21:43:26)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
or an adapter harness can be made.
862sik: (2012-07-23 07:40:29)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I just did this modification. I made a small adapter harness just incase for some reason my prw goes out and I cant find another one. I can always go back to my factory one if I had to.
At idle I didnt notice much, maybe a slightly smoother idle. I revved it a bit, seemed a little more peppy. But when I drove it, it did rev much faster as I granny shifted through the gears. Pickup was much nicer and smoother. I used to have a small hickup around 2200 rpms but thats gone now. It feels as if im not making the car work as hard as before when really getting on it.
In all, it was definitly worth it. Definitly.
silverton: (2012-07-23 17:58:52)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Sharpen047 wrote:
[archived image: 41IiIkzNTeL._SL500_AA300_.jpg]
This is what my power transistor set up is, I'm just going to assume that this PWR module is not a viable upgrade without modifying the chassis harness?or an adapter harness can be made.
Is there a write up on how to go about that?
michaelp: (2012-07-23 18:03:52)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]silverton wrote: [quote=Sharpen047]
[archived image: 41IiIkzNTeL._SL500_AA300_.jpg]
This is what my power transistor set up is, I'm just going to assume that this PWR module is not a viable upgrade without modifying the chassis harness?or an adapter harness can be made.
Is there a write up on how to go about that?
Doubtful. Buy me a S12 and I'll make a writeup for you. :nanan?re
Nothing in this thread applies to the S12 because as far as I am concerned until I get my hands on one, they are completely different.
Careless: (2012-07-23 18:22:00)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
why not look in the FSM ?
Kimbro Slice: (2012-07-24 03:54:28)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Lol
[archived image: IMAG0472.jpg]
I'll make a mount once I get the motor back in and running.
862sik: (2012-07-24 06:41:14)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I used the mount from the maxima. Bent the little tab and bolted it where the factory one went. I was going to make something nicer, but oh well lol.
Kimbro Slice: (2012-07-24 06:45:13)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I should've done something like that, but I was just pulling them off cars I saw and throwing them in my bag 'o tools. I want to use the bracket that the injector cooling fan uses, but I would need to drill out the holes on the PTU to run the correct size bolt to the nuts on the bottom of the bracket.
MichaelZ31Kelley: (2012-07-24 07:50:17)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Snagged a PRW-2A and a PRW-2. I'm going to test both and see if there is a difference between the two. The PRW-2A came off a Quest I believe.
862sik: (2012-07-24 08:46:41)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Kimbro Slice wrote:
I used the mount from the maxima. Bent the little tab and bolted it where the factory one went. I was going to make something nicer, but oh well lol.
I should've done something like that, but I was just pulling them off cars I saw and throwing them in my bag 'o tools. I want to use the bracket that the injector cooling fan uses, but I would need to drill out the holes on the PTU to run the correct size bolt to the nuts on the bottom of the bracket.
If you took it off a maxima then you have to take off the bracket with the module. The module is held on additionally with screws on the bracket.
862sik: (2012-07-24 08:47:54)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
If you got it off a quest, then you got it off a quest that was made before 1999 with the vg30 motor. The later year after 99 had an internal coil.
Just info for someone looking for it.
Careless: (2012-07-24 12:31:29)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I don't think there is going to be a discernable difference between the PRW-1/1a/2/2a ignitors. More importantly, check the wiring diagram for the version you have- but it seems as though they're all the same.
I think any of the PRW ignitors are just a lot better than the archaic transistors in the older versions. Perhaps the manufacturing process or materials are just a lot better at controlling ignition across all 3 leads.
-Strike-: (2012-07-24 13:25:22)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Hrm, maybe something to do next week. Should take a trip out to my local JY. Usually they have nothing there in the way of imports, but it's been a while since I've been. Last time I was there, he had a couple new VG33 pathfinders, But the S13 he had there for years was missing. Assuming he sent it off to the scrap heap finally. Was going to inquire about the rear subframe lol
FrozenZ: (2012-07-26 13:01:18)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Yep, I used a test harness and drove the original, PRW-1, and PRW-2 and the two newer ones were indistinguishable. I have also noticed what feels like a quicker throttle response and slightly smoother idle with the new versions.
RocklinMike300zx: (2012-07-28 04:31:44)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I installed this over at 862sik's place and it really feels like a new car. Throttle response is much better and it seems my powerband is actually always there, where prior to the swap I would often have "dead spots" hitting the gas in the lower RPM range.
Can't really speak for the idle as of now. Seems pretty stable, but I am still having what feels like a miss everyone once in a while at my normal idle. Around 1400rpm it disappears though.
Sharpen047: (2012-07-29 18:03:20)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
same, weird!
jaqattack02: (2012-08-03 13:32:51)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I haven't made a for sale thread yet, but I have 3 or 4 of these I'll sell that I pulled at the junkyard the other weekend. All PRW-2, all verified to work on my brother's 85 Z. I was thinking $12 shipped. PM me if you're interested.
michaelp: (2012-08-03 16:12:05)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[youtube:5kezcslq]-c_KUDHjbDE[/youtube:5kezcslq]
[youtube:5kezcslq]RrDPC5HApw8[/youtube:5kezcslq]
-Strike-: (2012-08-03 17:41:42)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Revs seem more responsive, but it looks like it's idling higher.
G-E: (2012-08-03 17:58:04)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
The idle seems less burbly
nater86zx: (2012-08-03 20:24:49)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Installed my PRW-2 today. No difference in start up, seems to idle a little better (less "bouncy"), rpm range seems smoother, and yes my flat spot has disappeared as well. Not bad for a $5.00 junk yard part. (Plus a new harness clip because I F*ed up the stock one on the first try). :mad Oops.
Kimbro Slice: (2012-08-06 23:35:45)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Yeah I've got some extra ones laying around that I grabbed as well.
$10 shipped here.
DudeZX: (2012-08-23 04:07:46)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Started my car tonight after doing this mod. Immediately noticed that it idled better, especially from a cold start. Engine runs smoother and the throttle response does seem better. I can't report on drivability improvement yet, as the car is still on stands, but as far as I'm concerned, this mod gets an A+.
Careless: (2012-08-23 04:27:27)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
maybe you'll put down more than 280whp because right now my car feels like a land missile on 8psi… prob heading towards 260-270whp
DudeZX: (2012-08-23 04:43:53)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Lol, have you raced anything? Because mine felt pretty quick, then I ran a few of my buddies cars and ended up being disappointed by a few and suprised by others. The numbers are sometimes irrelevant.
Careless: (2012-08-23 04:48:59)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
well when comparing cars using similar turbo setups, numbers can tell a lot.
DudeZX: (2012-08-23 05:05:16)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Your butt dyno does not take accurate measurements, lol.
Careless: (2012-08-23 05:35:55)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
the fact that other z31's with similarly sized turbos make more power is a pretty accurate indicator :-)
check yer shit.
michaelp: (2012-08-23 13:04:11)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
hey guys.....STFU about what numbers TJs car may or may not make. :nanan?re
Trbulnt: (2012-08-25 20:13:53)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Just finished this and the car does seem a bit smoother and responsive. The real test will be how it starts tomorrow morning.
Thanks for the write up and info. Yes I am aware how filthy my engine bay is!
[archived image: IMAG0524.jpg]
turblown: (2012-10-31 21:35:37)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I'm doing this mod this week. Sounds like such a great improvement for a little work! Subbing to remind myself of the part, lol.
Edit: My local JY has quite a few of these. If anyway one wants one, pm me and I'll see what I can do. [archived image: smile.png]
Kimbro Slice: (2012-11-01 21:10:02)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I've got a couple lying around if you haven't gotten one from a JY yet.
turblown: (2012-11-01 23:37:13)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]Kimbro Slice wrote:
I'm doing this mod this week. Sounds like such a great improvement for a little work! Subbing to remind myself of the part, lol.
I've got a couple lying around if you haven't gotten one from a JY yet.
Dang, just picked one up today, lol. Thanks anyway though Kimbro!
turblown: (2012-11-02 20:45:43)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Completed this mod today. Not a drastic change but overall everything feels better. It certainly idles better and seems to pull smoother on the runs. Again, not a drastic change but certainly work the 10 dollars and half hour of time I put into it!
edwin86z: (2012-11-21 09:17:37)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I'm finally getting around to working on the Z's engine, this is now on the list!
I'm also wondering what kind of engine Dave is running....
Hmm.... Helicopter engine? Awesome! :lol
Careless: (2012-11-21 20:59:01)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
Most Z's are blowing up at 7k, this guy is idling at 9k.
baaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaawse.
turblown: (2012-11-21 21:09:53)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I wanted to post this pic here for reference. I mounted my PRW-2 module on the coil pack. Bored out the holes on the transistor a little to fit 10mm bolts; otherwise, pretty easy. Ignore the homemade MBC; it's gone now.
[archived image: 2012-11-02_11-37-53_464.jpg]
Dave-D: (2012-11-22 02:49:12)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
[quote]edwin86z wrote: I'm finally getting around to working on the Z's engine, this is now on the list!
I'm also wondering what kind of engine Dave is running....
She did seem to idle smoother, the digital dash will fluctuate between 8k and 9k when sitting in traffic takes about a minute or so to see it happen. Today she sat pretty consistently at 8k. So is it making a difference? I don't know yet. But for the $16 I paid for the part its not like I'm worried about it. I also filled up today so we will see if it makes a difference in the MPGs as well.
Hmm.... Helicopter engine? Awesome! :lol
Seems my secrets out I'm running the first z31 jet turbine swap.....or.....its a typo [archived image: redface.png]ops: [archived image: redface.png]ops:
Make that 800rpm. :-D
edwin86z: (2012-11-22 08:07:57)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
I think a turbine Z would be awesome! I would do it, but I can't fork out for a used engine right now… :langue
THEBEAST: (2012-12-09 19:19:53)
Re: Upgrade to PRW-2 Ign. Control Module (Power Transistor U
did this mod the other day. i like the way it feels. that funky idle Zs have only come around every once in a while
ajaxism: (2013-01-25 10:06:36)
As long as it says 'PRW-2' on the unit will it work?
There's a bunch on eBay.com but the sellers aren't able to tell me if they work.
Can anyone pick out one from http://www.ebay.com/sch/i.html?_from…=prw-2&_sop=15 that will work?
michaelp: (2013-01-25 11:49:56)
None of them will know it works in a Z31, and technically it doesn't because it requires a wiring change....
jaqattack02: (2013-01-25 14:29:37)
My brother and I tested both a PRW2 and a PRW2A. Those are the only one's we've confirmed to work. Although as MikeP said, a small wiring change is needed. We've tried PRW2s from Maxima's, Pathfinders, and Frontiers and they all worked, so you should be good as long as it says PRW2 or PRW2A on it.
tatsu: (2013-01-25 15:44:55)
mine is a PRW-2A from a quest [archived image: smile.png]
jaqattack02: (2013-01-28 14:52:35)
The 2A we tried came from ebay. I think the guy said it was from a Sentra or something. In the end they are all the same.
les_joey_paul: (2013-01-28 21:47:12)
having a real hard time removing the wires on the stock connector -,-
any tricks to this?
I stuck a pin in just above the contact and was able to pull some of the black wire out, there's a good half inch of bare wire hanging out of the connector now, but its still snug in there…
les_joey_paul: (2013-01-29 00:42:27)
well since I couldn't get the wires loose I ended up just cutting them off of the connector, and then clamping them into the metal clips and slid the clips in place on the prw2. Im gonna get some electrical tape and wrap it up nice and tight tomorrow.
hopefully it works when I get to firing her up. (:
Dave-D: (2013-01-29 03:03:10)
Well you must not have even bothered to read the thread.....your answer as to how to open the connector is on page 6.
I had the same problem opening them up and once it was explained it is really easily done. I re-soldered the wired too and it has been working fine.
Page 6
beardedone87: (2013-02-15 09:07:50)
anybody have one or two of these they are willing to part with? I'd sure like to give i a try as I am experiencing soome these same "issues" and thiis seems like a SUPER easy fix!
Dave-D: (2013-02-15 14:09:36)
If you read thru the thread I think it was MichealP that listed a bunch of cars and years that have this component and can be found in the local jy. And these are also all over e bay for sale as well.....
Your could also post a want to buy thread and get a quicker response than posting here looking for one.
Augustus Maximus: (2013-02-15 21:10:20)
No need to do all that
http://www.ebay.com/itm/Nissan-Altim…53b6d2&vxp=mtr
http://www.ebay.com/itm/NISSAN-MAXIM…b84368&vxp=mtr
You can get them all day on eBay.
Joe87T: (2013-02-15 22:24:33)
lol mine came today from that eBay thingy
Black 89Turbo: (2013-02-16 01:10:21)
Go to your nearest junk yard and have a field day.
862sik: (2013-02-16 07:23:50)
For anyones info, the only quests that have it (and mercury villagers) is pre 99 models, those had the vg30. The vg33 went with a internal setup.
Tomakze: (2013-03-22 04:55:27)
I just got one out of a Quest as well. The factory bracket that comes with it makes the install stupid easy, and look factory. I installed it in exactly the same place as the original one! The PRW-2a works great.
TearingRaven: (2013-03-26 17:25:16)
Post pics! I added the PRW to the factory coil bracket, looks stock.
[archived image: A836B312-8A3E-40C5-AAE1-DCFA1472A8A2-1489-000001A03A682BE7_zps4fe8ba7d.jpg]
Tomakze: (2013-03-27 04:53:06)
Never mind the filthy engine bay… the car is a work in progress!
[archived image: 2013-03-21204750_zps958d79c8.jpg]
This was zero effort. It bolts right up (You do have to bend a little tab out of the way, but psh, that is too easy to count). Yours looks really nice though…
millsaps: (2013-04-03 23:03:29)
got mine today hopefully going to put it in tomorrow. btw pathfinders are the easiest ones to get. its on the pass side of the intake manifold near the back. maxima's were not too easy i gave up and found a pathy.
michaelp: (2013-04-03 23:11:29)
Altimas are the easiest to get, they're right on the MAF. lol
millsaps: (2013-04-03 23:22:45)
i didnt check altima's they were all to close to walk around them.
jaqattack02: (2013-04-04 02:51:09)
Maximas are easy, right by the coil. 12mm deep socket to take out one bolt. Snip the harness and it's out. Even comes with a bracket.
Careless: (2013-04-04 05:51:58)
yall jiggas. copyin' da michaelp steeze wit'cha sparky bits.
inqui-Z-tor: (2013-04-04 12:24:22)
Agreed .. but then .. ??
Careless: (2013-04-04 12:29:09)
i have no idea what the heck you're trying to say… if you're even trying. lol
TearingRaven: (2013-04-04 16:04:41)
Well apparently we are able to utilize the newer CAS as well?
michaelp: (2013-04-04 17:12:15)
Yes, but thats been known for ages. Its also direct plug and play. It can be found on some subarus too.
TearingRaven: (2013-04-04 17:27:31)
Any proven benefits?
michaelp: (2013-04-04 18:35:05)
Claimed…not sure if proven. One person made claims, everyone else decided you'd only see a change if your old one was on its way out. I have cars running perfectly smooth with a Z31 CAS and the PRW-2 versus with a good low-mileage Z31 PTU....and given the CAS' only job is to tell the ECU the position of the crankshaft I can't see how there would be benefits with better spark…but who knows in reality.
Augustus Maximus: (2013-04-04 18:38:43)
Finally one like mine…BTW my boys on Maxima.org gives them to me for free.
Z-31Turbo: (2013-04-04 19:20:28)
I need one. Dont think its worth the drive to the scrapyard. Who has them available? Pm please.
Augustus Maximus: (2013-04-04 20:36:45)
It's worth it…wafer technology got better, frequency got higher etc. It's a better transister.
Tomakze: (2013-04-05 02:56:29)
Right? This is the way to go, for sure. Ironically, I only noticed yours after I had already installed mine. Only reason I got a Quest one in the first place was because it was the first one I saw. I would say though, if anyone does this in the future, get a quest one with the mount if possible. That mount makes it super easy.
ozzyrulez: (2013-04-14 18:33:32)
I did the swap and I haven't really noticed any difference. It was easy enough to do so I wouldn't call it a waste.
Big_E-Dog2: (2013-05-03 22:45:42)
just did this on my vg30et 510 wagon yeah wayyy better. everyone should do this!
50thAE: (2013-05-07 04:00:56)
I saw improvement would it say it was massive but definitely enough to stay switched to it and to recommend it to others. the big thing I noticed was response and that I went from sounding like an old worn out car to a some what newer sounding car in the way that it revs and cranks. thank you Nissan for putting this motor in so many other cars out side of the 80s lol!
michaelp: (2013-05-07 12:17:11)
Has nothing to do with the engine…the PRW-2 PTUs are found on KA24s, SR20s etc…lol
Tomakze: (2013-05-08 05:54:31)
I looked at my KA24E motor… it has a PRW-1. Not sure what the difference is, it looks exactly like the PRW-2, except it is black. Anyone know what's up with that one?
Careless: (2013-05-08 09:14:17)
it interchanges. try it ooot.
'84z31: (2013-07-12 18:59:45)
Alright so this thread again. I've been having a ton of problems with my car dyeing on me and not starting here lately. I was told it's either the CAS or the ICM. I did some research online and found a post where someone suggested pooring cold water on teh ICM. When I did this my z started right up. So I immediately got online and found this thread. I replaced my ICM today with a PRW-2 and was unable to start it. I don't know why? Is there any way to test my new ICM? Or maybe my CAS is also bad? When i try to start the car you can hear the starter turning but nothing happens. HELP!!
Careless: (2013-07-12 19:28:23)
did you swap the wires that were described in this thread? if the answer is yes, then go ahead and change your CAS since it's obviously not the ignitor.
'84z31: (2013-07-12 19:52:26)
I did move the wires around. I think i went blue, black, and green when looking from the back side with the clip facing up. I did purcahse the ignitor used from ebay, so is it possible it's bad? As far as the CAS is concerned, I haven't a clue what I'm doing. Any suggestions because I'd like to do it myself. Any good write-ups? The shop i took it to quoted me at like $300~ for parts and labor.
Thanks.
Careless: (2013-07-12 20:04:40)
verify your wiring and try another ignitor. the fact that your car used to start before and it doesnt now (even though it started like crap before, as you said) is a clear indicator that something is wrong with the wiring or the ignitor. once that's solved, you can look into fixing the cas if it still starts rough.
'84z31: (2013-07-13 00:13:07)
I went and got the ignitor tested at Autozone and they said it was fine. As far as I can tell testing doesn't always work but I did it anyways. This is exactly how others wired theirs.
The original wiring harness that came with the PRW-2a looks like this.
I didn't notice until a few minutes ago, I did purchase the PRW-2a. Does that make a difference? Is there a reason why I shouldn't match the original wiring harness?
G-E: (2013-07-13 00:18:26)
The pinout on the ptu that we have and the pwr-1/2/2a is different, but the unit functions the same way, so to use a pwr-2a you need to repin the connector or cut and splice, or make an adapter harness that crosses over
'84z31: (2013-07-13 00:48:43)
What do you mean by the pinout? Do you mean each of these little metal clips? They look identical.
I switched out the actual plastic male connector modules if that helps.
'84z31: (2013-07-13 02:12:08)
I got the car started multiple times now so I know the ignitor works. More often than not though when I turn the key I hear the starter going, but the engine doesn't turn over. A few times the engine will turn over and then just die. Other times I can feel the engine just barely turn over once or twice as it attempts to start but then nothing. I may need to start a new thread but I'm not sure. Like I said earlier I've had a lot of problems here in the past couple months. My oil pressure has been messed up "like 5-25 pps" and so I recently took it in and got the vacum to the oil pump replaced. My oil pressure is still showing 30 on my gauge…which is probably lik 10-15 on an accurate guage. Anyways, they also told me that either my ignitor was bad, my CAS was bad, or both were. So that's what I'm tryihng to figure out. I just took the car out for a short drive and I was going 30 mph and the car just died and i started cruising. I pushed the clutch in and it started right back up. I can't figure out what's going on. I'm ready to trash this thing. [archived image: frown.png]
I'll also add that when my car idles it seems to be pretty rough. When I just barely apply some gas to rev up the rpms a bit the rpms dip before it increases to the point where it nearly dies. It will sometimes die while idling too.
les_joey_paul: (2013-07-13 02:36:16)
Pull the codes off your ecu
Careless: (2013-07-13 02:45:18)
there is no such thing as a vacuum for an oil pump. who is working on your car for you?
G-E: (2013-07-13 02:54:14)
Hahah vacuum reference for the oil pump :P05:06, 15 May 2026 (UTC)05:06, 15 May 2026 (UTC)
'84z31: (2013-07-13 04:42:34)
Yeah, I'll double check on monday to see exactly what the mechanic said they did to it. I'm so frustrated right now. I will say that my knowledge of car mechanics on a scale of 1-10 would be somewhere right around 0. I'd love to learn though. So any thing that you guys can do to help is much appreciated.
michaelp: (2013-07-13 04:54:51)
http://xenonz31.com/ECUcodes.html
A small flathead screw driver? :P
'84z31: (2013-07-13 05:15:29)
Oh, lol. That's even better. I will check that out tomorrow for sure.
'84z31: (2013-07-13 12:37:32)
Codes
11-Faulty Crank Angle sensor/circuit
12-Air Flow Meter/Circuit
13-CHTS Cylinder Head Temperature Sensor
21-Ignition Signal
23-Idle Switch circuit
31-ECU Control Unit
Suprise, suprise. So that's quite a few codes and the ones tripped pretty much make sense. 31 though, does that really mean I need a new ECU? This seems like a big task with all the codes, where do I start?
I started a thread so I don't completely hijack this thread any further. http://z31performance.com/showthread…320#post339320 Please follow me over to this thread and continue your awesome help.
aZinMA: (2013-07-20 18:36:10)
Anyone got a PRW2 they would give/sell to me? There's none in any of the cars in the junkyards near me.
Would really like to get the quest bracket too but I'm not picky. Let me know.
Ship to 01960.
Tanks mang!
Tomakze: (2013-07-21 00:34:48)
I will be going to the junkyard probably on Tuesday. There are almost always a dozen cars with the PRW-2. I can see if I can get one, and if anyone else would like one, let me know!
aZinMA: (2013-07-21 01:45:05)
sweet!
Tomakze: (2013-07-24 20:00:06)
Found some in the JY, will get them today… and I have one with a Quest bracket waiting for you if you want it! I will have extras as well, if anyone wants one!
designate72: (2013-07-24 20:14:08)
I'd like to get one, PM me. Shipping to 30082.
michaelp: (2013-07-24 20:20:02)
I have like 4 or 5 on hand if anyone wants some. PM me.
Tomakze: (2013-07-25 22:29:46)
Okay, I have about 8 in stock now. I'll sell them for $15 shipped (In the USA) with a bracket, in most cases. When I run out of brackets, I'll let you know. PM me if you want one! (I won't be able to ship until Tuesday next week though) I will test all units I sell.
Urstin: (2013-08-07 01:19:15)
I made a small video of this mod! Thanks for the how-to Raff!
[http://[video=youtube_share;-M_Vj6JyzOg http://www.youtube.com/watch?v=-M_Vj6JyzOg&feature=youtu.be[/video]] [archived image: yt_logo_rgb_light.png]]
Careless: (2013-08-07 06:32:58)
dont thank me.
Urstin: (2013-08-07 21:52:49)
Thanks for the how-to Mike!
Urstin: (2013-08-07 22:59:13)
Before anyone's ego clocks out early from work, thank you distortionfile.
FlawleZ: (2013-08-08 14:17:30)
Well I go dormant for a year and neat little stuff like this pops up. Will order one today. Thanks MichaelP and Careless.
shromy: (2013-08-08 16:34:38)
http://www.ebay.com/itm/22020-12P11-…c9e244&vxp=mtr
Dont know if anyone ever noticed, looks like nissan had the idea before anyone else
Careless: (2013-08-10 13:32:16)
actually, 3rd party manufacturer/supplier Airtex had the idea before anyone else, not Nissan. don't be fooled by the sale ad or the part number, the 22020-12P11 number listed is the original nissan number and is merely there for compatibility verification (notice how it says "FITS" as the first word).
the photo posted is what you get when you order the unit from Airtex; Part Number # 6H1213. Roughly $100. For all intents and purposes, I'd say the upgrade is somewhat worth 100 dollars if there were no way to achieve the same results by spending about 1/5th of that. But you get a fancy bracket, though! lol.
if you use the supplied number and order it from Nissan, you'll get this:
When nissan runs out of the transistors, they will be NLA or a new number will be issued. The old number gets you the old part (for restoration purposes, mainly).
If you look closely, you can see the 12P11 nissan part number engraving on the baseplate/heatsink mount on the lower photo, too.
Tomakze: (2013-08-10 23:22:54)
I still have a ton of these things in stock if anyone wants one! Way cheaper than $100, too. Although it is cool to see a company doing this too!
Urstin: (2013-08-12 00:02:23)
^^ Word. I got mine from him, works great!
FlawleZ: (2013-08-15 04:34:19)
Just installed mine today. Noticed a little smoother revs and a little more throttle response.
aZinMA: (2013-08-18 02:37:03)
I HIGHLY recommend this upgrade. I finally put mine in my 86 turbo today after making a trip to the J/Y to get some plug ends to make a crossover. For the record, she's got 164k and only upgrades are intake and exhaust, the rest is stock.
I too noticed a much smoother idle and quicker throttle response. On a road test, the new throttle response feels like I advanced my timing. It reminded me of my younger days with my 73 buick century when I would advance the timing and flip the round air cleaner cover to get more kick. lol
Now I'm in the process of fabricating a nice mount out of stainless angle iron. I was thinking of trying to somehow incorporate a computer cpu heat sink to it to help dissipate heat.
Thanks Mike!
aZinMA: (2013-08-22 02:04:12)
So I made a bracket for the PRW-2 out of stainless. I have some more material left if anyone wants me to make them one, but the material wasn't cheap so I'll have to get $20 shipped.
I could make one out of regular angle iron, but I think I'd weld the perpendicular piece rather than twist it. I'll sell one of those versions for $10 shipped… dipped in rustoleum gloss black $15 shipped.
PM if interested.
Hardware and PRW not included.
I'm redoing the harness I made so I only put one screw in to hold it in place for the pic.
G-E: (2013-08-22 04:39:48)
Why not make it bent over above the bottom one or even the other way, like a Z, instead of twisting? The unit would sit flat then and fabrication would be simpler
jaqattack02: (2013-08-22 20:05:40)
The one's in the Maxima and Pathfinder both come with their own bracket that are pretty easy to find a place to attach to.
Tomakze: (2013-08-22 21:47:53)
The best brackets are from the Nissan Quest and certain Maximas. Those are the ones I've shipped to various people. All I had to do was bend a tab to mount it in the stock location, and it looks great. I'm out of PRW-2s with those brackets, but still have two spares. One with the bulky pathfinder bracket, the other without any bracket. I'll do a JY run soon to get more.
aZinMA: (2013-08-23 01:41:31)
^^ "The best brackets are from the Nissan Quest and certain Maximas."
So I've heard/read. There aren't any around here though, and the zip ties I was using was driving me insane. So I had some extra stainless left over from a pinball machine project (Funhouse), was bored and voila. I don't expect to sell any, I really only threw that number up there cuz if I didn't I'd get people wanting to know how much to make them one.
Tomakze: (2013-08-23 01:46:30)
I think your bracket looks great! In theory, it is a MUCH better solution than the Maxima/Quest bracket. I was more mentioning how easy it usually is to get one of those brackets. I understand if it is hard to acquire though… I can only get a limited supply depending on what shows up in my local JY. It would be good to have a reliable source when scavenging dries up. I'm out right now, for that matter.
Big_E-Dog2: (2013-08-23 20:52:22)
infiniti m30. has the mount for the pwr 2 (but theres a pwr1 in its spot) and it has a cover..
Cant beat it LOL!
Tomakze: (2013-08-24 00:54:18)
With a cover? Very cool! Besides, from what I understand, the PRW-1 is still an upgrade.
michaelp: (2013-08-26 19:58:06)
M30s are rare as fuck, though.
Big_E-Dog2: (2013-09-04 23:05:21)
well then guess theres a way to make some money lol!
pics of said backet…
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amreboot: (2013-09-09 13:02:57)
Here is my setup.
Its a complete assembly setup from a M30 including the black plastic cover.
The transistor is the PWR-2
Rustspecs13: (2013-09-20 01:10:41)
You can also get those off S13's.
~Alex
Urstin: (2013-10-22 16:40:07)
Just wanted to add, anyone with an 84-85 who has done the PRW-2 mod and/or idle block off, BUY AN 87NA ECU! Holy dogfish is it an improvement!
alyason: (2014-01-15 01:27:04)
4/87T was having some serious cold start issues. The ECU gave code 21 (if I remember correctly) which is the ignition system. Turns out this can be the PTU, CAS, or Coil, according to the FSM, or a bad ECU. I happen to have spares of everything but the PTU and ECU so I swapped as much as I could with no difference.
Symptoms:
Terrible cold start, would sometimes die without increasing throttle.
High idle, up to 1200 at times.
Would dive the RPMs from 900-400 and back up
Would miss every ~4 seconds
letting off the throttle, shifting to neutral, or coming to a stop would sometimes kill the engine or dive the RPMS like above.
When up to temperature, it ran ok but conservative gas mileage would be at 9 max in town, highway still up to 26
I upgraded to the PRW2 and it fixed everything. Writing this just in case someone else has similar symptoms.
Filipe: (2014-01-16 01:13:23)
^^^Impressive. Just got mine today!
designate72: (2014-01-22 22:00:06)
Does this also apply to the 86?
Filipe: (2014-01-23 00:43:58)
^^^
Not really. 84/85 were the years with the lean surge issue.
PrideZ31: (2014-05-06 20:36:45)
^^^
Not really. 84/85 were the years with the lean surge issue.
Hmmm, would an 11/85 build date effect an 86?
PrideZ31: (2014-05-06 22:52:00)
By the way guys. I had a problem with my PRW-2 a little while back. Luckily I had another on hand in the hatch.
What was happening was when I'd started the car it'd start, idle, but literally 3 seconds after starting it just died. Turn the key again, starts and runs for 3 seconds and just dies. I was like running around the car checking things and I was like.. At the end of my rope with this thing. I had let it sit over night at a friends already because it wouldn't run long enough to go anywhere.
Finally I said fuck it, and put my other PRW-2 on there… And BAM it stayed running.
Just a tip
slaponte: (2014-11-20 22:22:21)
Went to the junkyard today. Maximas everywhere, easiest one to find. Got two with brackets. $9 each. Just in case. I also received my new coil from RockAuto yesterday. And....
IS ALIVE!! Started right up. Not sure which one it was, but who cares. ;-)
Ski300zx: (2017-04-10 13:47:15)
Bought one from nissan ($160 with my discount) and put it in, made a bracket from a heat sheild from the back mount on an MDX, and i noticed the response difference as soon as i rev'd it up. Awesome mod!
Pace: (2018-07-11 21:02:29)
bump cause I'm doing my two cars
It's a "stickied" topic. It stays at the top of the page. [archived image: wink.png]
Did you have a question about the upgrade?
zachary.ard: (2018-10-24 18:24:24)
Adapters are available now to avoid having to depin and possibly damage your harness.