Editing Forums/Z31P/z31-repairs-forums electronics/FIX Running HVAC controls WITHOUT vacuum canister

{{ForumImport
|op_user=Ubernathan
|op_date=2018-10-02 12:45:46
|post_count=3
|archive_url=/Z31performance_archive/forum/z31-repairs-forums/electronics/541258-fix-running-hvac-controls-without-vacuum-canister.html
}}

'''Ubernathan:''' <small>(2018-10-02 12:45:46)</small>

*Mods feel free to move*

*For N/A models only, you need a vac canister for turbo models due to boost being introduced to the system that runs on vacuum*

So this is my 2nd post, but given I had difficulty finding a clear solution, I'm hoping/feeling this may help shed some light on the daunting HVAC / Defrost / Heat problem.

I was blessed with a car that had the vac canister ripped out and no regards to what went where as far as engine bay lines, so I ran a line from the plenum --> 1-way check valve --> T-fitting --> (1 line to top of water cock solenoid, other to inside firewall to T-fitting supplying all under-dash vac sources). Made a short 3min video explaining and showing this as well for those of you who are visual like I am. Hope this helps some out there with the same problem.

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'''Dunkine:''' <small>(2018-10-03 00:16:20)</small>

Nice Vid

Turbos have a check valve on them already.

A few have done something similar with the Vac canister to keep it from going to defrost when accelerating hard.

Have you tested it under load yet?

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'''Ubernathan:''' <small>(2018-10-03 02:55:13)</small>

{{Quote|user=Dunkine|Nice Vid

Turbos have a check valve on them already.

A few have done something similar with the Vac canister to keep it from going to defrost when accelerating hard.

Have you tested it under load yet?}}

Thanks, just trying to help someone out there. Under load it functions just as it should, so I was really happy about that. I need to charge my AC but I could feel the different between air when the solenoid would open and close under heat/cold.