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

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.

RepairPal Verified
Average mileage: 166,167 (117,000–211,678)
Engines affected: 3.1L V6, 3.4L V6
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996
22 people reported this problem
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problem details
1992 Oldsmobile Cutlass Supreme - 3.4L V6 140,000 mi,
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.
1990 Oldsmobile Cutlass Supreme - 3.1L V6 135,000 mi,
erratic idle, loping
1995 Oldsmobile Cutlass Supreme - 3.1L V6 185,000 mi,
problem; overheating, power streing leaks and radiator will not hold water
Runs real rough wen u give it gas n dies
1995 Oldsmobile Cutlass Supreme - 3.4L V6 117,000 mi,
engine began to idle at about 2000-2500 rpms