1994 GMC Yukon Q&A

1994 GMC Yukon Question: Intake manifold

What are some of the best ways to test for a leaking intake manifold gasket. I have a miss during highway accerating. Thanks -
Answer 1
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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