how do you test vacuum pressure?
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From: New York
Car: 1988 Chevrolet Camaro
Engine: 2.8 v6
Transmission: Auto
how do you test vacuum pressure?
how do you check your vacuum line system's pressure? I think it should be pulling 12-14 psi at idle, but how do i find out if it is?
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From: Yay Area, CA
Car: 1988 GTA
Engine: 350 TPI
Transmission: 700-R4
Axle/Gears: 9-Bolt 3.27
Use a vacuum gauge and hook it up to a vacuum line off your plenum. I pulled over 18in/Hg off mine.
Last edited by G-Ride14; Jun 20, 2006 at 10:27 PM.
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From: New York
Car: 1988 Chevrolet Camaro
Engine: 2.8 v6
Transmission: Auto
easy enough I guess... 18psi is better it seems, after a bit of research 20+ psi means your car is running optimal... gotta find a vacuum gauge... but since it's about the same price to get a car/dash mountable one and a handheld one, I might as well get the mount one?
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Your vacuum gauge will show vacuum in inHg, not psi.
20 or so inHg at idle is fairly normal with a wimpy stock cam. The larger the cam, the lower the vacuum reading.
20 or so inHg at idle is fairly normal with a wimpy stock cam. The larger the cam, the lower the vacuum reading.
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Originally Posted by 12SecondTA
yikes i do have low vacuum, i shoot for 9Hg at idle....
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