Intake Manifold and PCV Vacuum Lines/Hoses Can Leak Due to Age: Oldsmobile Cutlass Supreme Engine & Powertrain

Problem overview

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.

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Intake Manifold and PCV Vacuum Lines/Hoses Can Leak Due to Age on Oldsmobile Cutlass Supreme

Problem overview

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Intake Manifold and PCV Vacuum Lines/Hoses Can Leak Due to Age on Oldsmobile Cutlass Supreme

Problem overview

Oldsmobile Cutlass Supreme vehicles with this problem

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General Diagnosis

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