1991 Pontiac Grand Prix Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1991 Pontiac Grand Prix
Never overpay. Check prices with our estimator
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Our experts translate recalls into plain English
1991 Pontiac Grand Prix ProblemsIntake Manifold Gasket May Leak Coolant or Engine Oil
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.
The high pressure power steering hose will commonly leak fluid; it should be replaced.
The fuel pump may fail causing engine to stall and not restart.
1991 Pontiac Grand Prix QuestionsWhy vehicle starts on a cold start then rough after 5 to 12 min and Stahls (3 answers)
I replaced the computer (used the same prom), Replaced IAC, Crank position sensor, replace three bad injectors, spark plugs fuel pump, fuel filter, battery , alternator, tried doing Idler relearn but it start idling eradicly the shuts down. Its starts back some times or it will crank but will not...
already change fuel pimp and regulator
steering wheel removal. has radio controls on it. thanks