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1994 GMC Yukon Question: Intake manifold

 

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Visitor, 5.7L V8, Minneapolis, MN, March 07, 2011, 07:41
 Rookie

What are some of the best ways to test for a leaking intake manifold gasket. I have a miss during highway accerating. Thanks

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  • Answer #1

    MissBiker from Tri State Auto Repair, March 07, 2011, 08:39
     Enthusiast

    Spray 2+2 around the intake manifold to see if the RPM's (idle) increase or decrease. If it makes a difference in the RPM's, you probably have a vacuum leak.

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