Editing Forums/Z31P/z31-repairs-forums engine-mechanical/car has no injector paulse

{{ForumImport
|op_user=Sweet 86T
|op_date=2010-03-07 23:46:38
|post_count=10
|archive_url=/Z31performance_archive/forum/z31-repairs-forums/engine-mechanical/9752-car-has-no-injector-paulse.html
}}

'''Sweet 86T:''' <small>(2010-03-07 23:46:38)</small>

im having a problem with my 86 t. i rebuilt the motor and swapped the tranny for a 5 speed and now the car wont start. im not getting an injector paulse. the cas is working and the signal is making it to the ecu. i tested the injectors at the ecu and thay have the constante 12v like there sposed to. i have spark and i can get it to fire if i spray it with either. i hope u guys can help me out it realy starting to get to me.

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'''New 2 Z:''' <small>(2010-03-07 23:56:07)</small>

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does the engine even crank? did you rewire the inhibitor switch? get a diode light (sp) and check the injector harness.

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'''BLOZ UP:''' <small>(2010-03-08 00:29:33)</small>

You have to jump the inhibitor relay.

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'''nismopu:''' <small>(2010-03-08 01:17:52)</small>

When I did the auto swap my car wouldnt start at all, meaning no signal to the starter solenoid. I wonder if you blew a fusible link to the injector harness, I have seen it before and it sounds likely to be the case. The fusible links are located in front of the battery in a little black box, there should be three sets of them. I believe its the set that says EGI INJ and EGI CONT should be able to jumper them with similar gauge wire to test whether or not they're burnt. peace.

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'''Sweet 86T:''' <small>(2010-03-08 02:52:23)</small>

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i did switch all the wires and it does crank over i have spark . i put a diode light on and it dosent flash i kno i have the full 12v to the injector but the computer isent grounding the other side. if i spray it with starter fluid it fires so i kno that i ahve my timeing close enough and i have spark at the right time just no injector paulse. i looked at the fuseable links and thay looked fine and i pulled on each one . usaly when there blown thay chang color and will stretch or brake when pulled on . and i looked at the fix that nissan did with the injector harness and all connections are good. im getting a c.a.s signal at the ecu and i have switched the c.a.s with a diffrent 1.

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'''New 2 Z:''' <small>(2010-03-08 02:56:18)</small>

[quote]'''Sweet 86T wrote:''' 

{{Quote|user=nismopu|When I did the auto swap my car wouldnt start at all, meaning no signal to the starter solenoid. I wonder if you blew a fusible link to the injector harness, I have seen it before and it sounds likely to be the case. The fusible links are located in front of the battery in a little black box, there should be three sets of them. I believe its the set that says EGI INJ and EGI CONT should be able to jumper them with similar gauge wire to test whether or not they're burnt. peace.

i did switch all the wires and it does crank over i have spark . i put a diode light on and it dosent flash i kno i have the full 12v to the injector but the computer isent grounding the other side. if i spray it with starter fluid it fires so i kno that i ahve my timeing close enough and i have spark at the right time just no injector paulse. i looked at the fuseable links and thay looked fine and i pulled on each one . usaly when there blown thay chang color and will stretch or brake when pulled on . and i looked at the fix that nissan did with the injector harness and all connections are good. im getting a c.a.s signal at the ecu and i have switched the c.a.s with a diffrent 1.}}

fuses?… re edit: look for where your ECU grounds at, maybe it rusted.

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'''Sweet 86T:''' <small>(2010-03-08 03:01:19)</small>

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i jumped that and i got mt reverse lights to work . just have no injector paulse. i just dident kno if theres somthing weird wit the nissan system that would shut my injectors down or somthin in that nature. i have fuel to the injectors and my fuel pump kicks on like normol.

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'''BLOZ UP:''' <small>(2010-03-08 14:39:19)</small>

I don't know what to tell you then. I swapped mine over from auto last summer. I had to jump the inhibitor relay, which would let it crank over. That doesn't seem to be your problem.

Get a FSM, and start tracing wires.

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'''Rick88ss:''' <small>(2010-03-08 18:45:25)</small>

bad ecu?

check all engine harness grounds.

Do you need to use a 5 speed ECU if you swap the tranny from auto to 5 speed?

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'''RXGhost:''' <small>(2010-03-09 22:26:47)</small>

fallow the FSM for the injector inspection, its checking grounds and power and the output of ecm