1993 Pontiac Grand Prix Problems
RepairPal has identified the most common problems with the 1993 Pontiac Grand Prix based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
One or more power windows may stop working due to a failed window motor or switch. Proper diagnoses will be necessary to determine the exact cause.
The high pressure power steering hose will commonly leak fluid; it should be replaced.
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.
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.
Contaminated brake fluid can cause problems in the brake system and it should be flushed every 60,000 miles.
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.
Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.