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Chevrolet Lumina Intake Manifold and PCV Vacuum Lines/Hoses Can Leak Due to Age

 
Chevrolet Lumina Problem
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Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997

Engines Affected: 3.1L V6, 3.4L V6

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The upper intake manifold gasket and/or a PCV vacuum lines/hoses can develop vacuum leaks with age. This type of leak can result in a higher that normal or rough idle.

  •  Enthusiast

    Problem developed after replacing temperature sensor. Found vacuum leak on PCV line where it "T"s into throttle body/Intake. Replaced Vacuum line.

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