The intake manifold gaskets can develop external engine oil or coolant leaks. The intake manifold will need to be removed and the gaskets replaced to correct this issue. In some cases the plastic intake manifold my be damaged requiring replacement.
Resources for the Repair and Maintenance of your 1998 Pontiac Bonneville
1998 Pontiac Bonneville
1998 Pontiac Bonneville Problems
The mode and temperature door actuators may fail causing improper air flow or temperature output from the heating and AC (HVAC) system.
The mass air flow or crankshaft position sensor may fail causing the engine to stall intermittently. Proper diagnoses will be necessary to determine the cause of any stalling condition.
The water pump may develop a coolant leak resulting in an engine overheating condition.
The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.
1998 Pontiac Bonneville Recalls (Recent)
Summary: ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH 3800 V6 (L36) ENGINES AND CERTAIN DELPHI FUEL PRESSURE REGULATORS, THE REGULATORS HAVE A MUCH HIGHER THAN USUAL RATE OF FUEL LEAKS. A LEAK CAN ALLOW FUEL TO ENTER THE INTAKE MANIFOLD THROUGH A VACUUM LINE. IF THE ENGINE DOES NOT START WHEN CRANKED, THE FUEL FROM THE LEAKING REGULATOR AND A MISTIMED SPARK CAN CAUSE A BACKFIRE.Learn more »
1998 Pontiac Bonneville Questions and Answers
what can cause the transaxle to not engage? The linkage is fine, the car just will not move in any gear. the fluid and filter are fine. Does the entire transaxle need replaced?
what is the door that opens into the trunk located in the middle of the back seat for ?
what is the opening in the middle of the back seat for that opens into the trunk ?
how do i replace the front transmisson seal?
It will stall as I'm driving and won't restart without disconnecting battery and setting overnight. When this occurs the electric seats, windows, locks don't work. Sometimes when I u...