1991 Oldsmobile Cutlass Supreme Problems
RepairPal has identified the most common problems with the 1991 Oldsmobile Cutlass Supreme as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.Refine by vehicle
The spark plugs should be replaced every 30,000 miles and the spark plug boots should be checked for hot spots and cracks.
An engine oil leak may develop from the oil pump drive O-ring. This can often be confused with an intake manifold gasket leak. Careful inspection is required to determine the exact cause of the leak. Replacement of the failed 0-ring will commonly correct this concern.
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.
Contaminated brake fluid can cause problems in the brake system and it should be flushed every 60,000 miles.
The timing chain tensioner and guides are prone to wear and may develop an abnormal noise, requiring replacement.
The engine vacuum hose to the MAP sensor may crack resulting in a vacuum leak causing the engine to run rough and/or stall.
The engine temperature sensor wire for the engine temperature gauge, or warning light, may touch the rear exhaust manifold causing a short to ground causing erratic operation of the temperature gauge or warning light.