A/C Vacuum Manifold?
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Joined: Dec 2004
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From: Orlando,FL
Car: 1987 GTA Trans Am
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Borg Warner 9-Bolt 3.27
A/C Vacuum Manifold?
I'm trying to track down why I'm only getting air out of the vents and nowhere else no matter what setting I put it on. I saw some others commented in other threads about removing a A/C vacuum manifold and a resistor being bad. I'm just not 100% sure where this is but I know I'm in the right area. I've attached pictures of what I thought it may be. Any help would be greatly appreciated.


Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 12
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Venting His Frustration
There is no “resistor” in the blend doors operation.
When you say “vents” you didn’t say which ones so we will assume defroster vents.
The problem is usually caused by weak or no vacuum going to the mode selector.
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Happy Racing!
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My Brakes Don’t Work AT ALL When The Car Is Sliding On It’s Roof
When you say “vents” you didn’t say which ones so we will assume defroster vents.
The problem is usually caused by weak or no vacuum going to the mode selector.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
My Brakes Don’t Work AT ALL When The Car Is Sliding On It’s Roof
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