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Intake manifold on 1994 GMC Yukon

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
What are some of the best ways to test for a leaking intake manifold gasket. I have a miss during highway accerating. Thanks
(1) Answer
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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.