Oldsmobile Cutlass Supreme Problem Report

Oldsmobile Cutlass Supreme Rough and/or High Idle Due to Engine Vacuum Leak

(19 reports)

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.

erratic idle, loping -
problem; overheating, power streing leaks and radiator will not hold water -
idls very low . when put in drive or rev. engine cuts off. i have to two foot drive so it doesn't cut off at red lights. -
engine began to idle at about 2000-2500 rpms -
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