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Intake Vacuum

minifridge1138

Well-known member
Joined
Feb 2, 2007
Messages
908
Location
USA
Corvette
1982 Black Fastback
Hello everyone,

I just bought a vacuum gauge, and I'm going to use it to help tune my carburetor. I know I want to adjust the idle mix until i get the strongest vacuum. Where should i pull the vacuum? Can i just plug the gauge into the hose going to the timing advance?

Thanks everyone!
 

wishuwerehere82

Well-known member
Joined
Sep 6, 2003
Messages
2,314
Location
Rochester, NY
Corvette
Red '82 Coupe,Sebring Silver '98 Coupe
Just put a "T" fitting in-line on the vaccuum advance line to the distributor.
That will get you manifold vaccuum and allow the advance to work too.
 

o2bnkc

Well-known member
Joined
May 3, 2004
Messages
450
Location
Carson City, Nv.
Corvette
2002 M.Y. convertible
Hey duke94, that was a great explanation of how to use a vacuum gauge. A friend of mine, who is a pretty good wrench, is always telling me that all he needs is a vacuum gauge to find out what the problem is. After reading that, I can understand what he means now.
 
Joined
Apr 29, 2001
Messages
2,141
Location
Rio Rancho, NM
Corvette
1981 HD Suspension; ZN1 Option
My Vette has an automatic tranny, so I use the port where the modulator connects to at the manifold.
 

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