Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/Vacuum questions - Revision history

XenonzcarImporter: Rewrite 1 archive URL(s) to internal wikilinks

2026-05-17T01:59:23Z

Rewrite 1 archive URL(s) to internal wikilinks

← Older revision		Revision as of 01:59, 17 May 2026
Line 33:		Line 33:
	~6 feet		~6 feet

	[~~https://dev.z31library.com/xenonzcar_archive/z31~~/hotairfromac~~.html~~ https://dev.z31library.com/xenonzcar_archive/z31/hotairfromac.html]		[[Z31/hotairfromac php\|https://dev.z31library.com/xenonzcar_archive/z31/hotairfromac.html]]

	On the Z31 300zx there was two different designs of the Air Conditioning system used, A manual system used on the GL models that used sliders for adjustment and an automatic climate that was offered on GLL models as well as the 50th AE. This system was Digital and used sensors to monitor and adjust temperature and air flow.		On the Z31 300zx there was two different designs of the Air Conditioning system used, A manual system used on the GL models that used sliders for adjustment and an automatic climate that was offered on GLL models as well as the 50th AE. This system was Digital and used sensors to monitor and adjust temperature and air flow.

XenonzcarImporter: Rewrite external links to local extras_archive mirror

2026-05-16T22:29:22Z

Rewrite external links to local extras_archive mirror

← Older revision		Revision as of 22:29, 16 May 2026
Line 15:		Line 15:
	see:		see:

	[~~http~~://www.thumper300zx.com/~~z31~~/~~vacuum~~/~~vacuum~~.~~htm http:~~//www.thumper300zx.com/~~z31/vacuum/vacuum.htm~~] ''VACUUM TANK HOSES''		[https://dev.z31library.com/extras_archive/www.thumper300zx.com/ https://dev.z31library.com/extras_archive/www.thumper300zx.com/] ''VACUUM TANK HOSES''

	Intake to Vacuum Tank		Intake to Vacuum Tank

XenonzcarImporter: Clean remaining xenonzcar URL variants

2026-05-16T21:25:27Z

Clean remaining xenonzcar URL variants

← Older revision		Revision as of 21:25, 16 May 2026
Line 33:		Line 33:
	~6 feet		~6 feet

	[~~http~~://~~xenonzcar~~.com/z31/hotairfromac.html ~~http~~://~~xenonzcar~~.com/z31/hotairfromac.html]		[https://dev.z31library.com/xenonzcar_archive/z31/hotairfromac.html https://dev.z31library.com/xenonzcar_archive/z31/hotairfromac.html]

	On the Z31 300zx there was two different designs of the Air Conditioning system used, A manual system used on the GL models that used sliders for adjustment and an automatic climate that was offered on GLL models as well as the 50th AE. This system was Digital and used sensors to monitor and adjust temperature and air flow.		On the Z31 300zx there was two different designs of the Air Conditioning system used, A manual system used on the GL models that used sliders for adjustment and an automatic climate that was offered on GLL models as well as the 50th AE. This system was Digital and used sensors to monitor and adjust temperature and air flow.

z31p_Brick: Forum archive import (z31performance)

2026-05-15T05:12:53Z

Forum archive import (z31performance)

New page

{{ForumImport
|op_user=Brick
|op_date=2019-09-20 16:04:51
|post_count=6
|archive_url=/Z31performance_archive/forum/z31-performance-upgrade-forums/engine-mechanical-aa/544499-vacuum-questions.html
}}

'''Brick:''' (2019-09-20 16:04:51)

I recently purchased a 86 na and it has no heat.the previous owner changed all the vac lines. I have looked high and low for the answer to this question. I have 3 vacuum lines going to the canister but I'm not sure they are in the proper place. Could someone please tell me which line goes to the selinoid with the 2 wires and which port the water cock goes on?

----
'''dbruce:''' (2019-09-20 16:27:33)

see:

[http://www.thumper300zx.com/z31/vacuum/vacuum.htm http://www.thumper300zx.com/z31/vacuum/vacuum.htm] ''VACUUM TANK HOSES''

Intake to Vacuum Tank
3mm
46" (modified)

Cruise to Vacuum Tank
4mm
28" (modified)

A/C Heater Cock Control to Vacuum Tank
3mm
39" (modified)

Vacuum Tank to Firewall
''not measured''
~6 feet

[http://xenonzcar.com/z31/hotairfromac.html http://xenonzcar.com/z31/hotairfromac.html]

On the Z31 300zx there was two different designs of the Air Conditioning system used, A manual system used on the GL models that used sliders for adjustment and an automatic climate that was offered on GLL models as well as the 50th AE. This system was Digital and used sensors to monitor and adjust temperature and air flow.

We will be discussing the problems and fixes for both systems on this page.

[archived image: Vacuumlinessmall.png]

----
'''Brick:''' (2019-09-20 17:38:23)

Thanks for the response, I have looked at that page a few times and I think what I need is line 19, but I can't seem to find it on the page.

I have the manual pdf as well. If I'm reading it right it looks like the line from the water cock goes to the selinoid.

----
'''Brick:''' (2019-09-20 17:41:02)

I have the manual heat and ac

----
'''Brick:''' (2019-09-21 01:42:00)

After doing some poking around with my multimeter I found that I'm getting 12volts to the selinoid but it is activating so I believe this is my culprit. The selinoid itself I can't find for sale but I found a universal vacuum selinoid on Amazon and ordered it. I'm going to attempt to make it work. I'll remove the old selinoid and jb weld a vacuum connector into its place and then plumb in the new one. Wish me luck.

----
'''FlyingT:''' (2019-09-23 17:44:44)

try here for the solenoid

[http://www.300zxpartsforyou.com/ http://www.300zxpartsforyou.com]