New engine HVAC Issue
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Joined: Mar 2011
Posts: 101
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From: Mariposa, CA
Car: 88 Camaro IROC-Z
Engine: 5.7L 350 TPI
Transmission: 700r4
Axle/Gears: Stock
New engine HVAC Issue
Ok I got the engine into the camaro I just got. Now im connecting everything. I know the HVAC has two vac lines comming out of the firewall. I know that once is for the heater valve and one goes to the intake/vac canaster. but the question is how do i tell which one? they both stick out of the harness about 5 inches and their both black. 
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Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: New engine HVAC Issue
Connect them up, if your heater blows only out of the defrost vents, then switch them.
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