2 vacuum lines p/s of firewall?
Thread Starter
Joined: Jul 2010
Posts: 833
Likes: 17
From: The Jersey Shore
Car: 1991 Firebird Convertible
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.45 9 Bolt Posi
2 vacuum lines p/s of firewall?
I have 2 vacuum line rear p/s of firewall i assum 1 is hvac and goes to plenum, but what is the other one?
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Joined: Jul 2011
Posts: 9
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From: Northeast
Car: 1987 IROC
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: Borg Warner 9-Bolt Disc 2.77
Re: 2 vacuum lines p/s of firewall?
I believe that it goes up to the heater control/bypass valve. It should be located up around the front of the valve cover on the passenger side.
Thread Starter
Joined: Jul 2010
Posts: 833
Likes: 17
From: The Jersey Shore
Car: 1991 Firebird Convertible
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.45 9 Bolt Posi
Re: 2 vacuum lines p/s of firewall?
oh ok both the heater control valve and cruise i deleted so makes sense
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