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: 162,334 (117,000–211,678)
Engines affected: 3.1L V6, 3.4L V6
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996
19 people reported this problem
4 people shared problem details
1990 Oldsmobile Cutlass Supreme- 3.1L V6135,000
erratic idle, loping
2 people like thisFlag inappropiate
1995 Oldsmobile Cutlass Supreme- 3.1L V6185,000
problem; overheating, power streing leaks and radiator will not hold water
1 person likes thisFlag inappropiate
1992 Oldsmobile Cutlass Supreme- 3.4L V6140,000
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.
1 person likes thisFlag inappropiate
1995 Oldsmobile Cutlass Supreme- 3.4L V6117,000
engine began to idle at about 2000-2500 rpms
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