20 Most Recent 1998 Pontiac Bonneville - Page 4 Questions & Answers


This is a litlle strange as the master cylinder has the brakes usually set up with the fronts together and the rears together. you can see if the caliper on the front is siezed and the master cylinder frozen on the rear wheel. Does the car have ABS and if so have the lights come on

1998 Pontiac... | Answered on Jul 22, 2014


Have the computer checked for code error,s.

1998 Pontiac... | Answered on Jul 20, 2014


Top of the steering pump

1998 Pontiac... | Answered on Jul 17, 2014


My first impression would be the serpentine belt is worn ...specifically it has "glazed" and stretched so it no longer has the ability to effectively grip the drive pulleys it spins. Typically when the serpentine belt loses "traction" it will squeal as it slips on the metal pulleys of the accessories it is designed to operate. There also may be a problem with the the tensioner ...a device used to keep proper tension on the serpentine belt. This is an easy and relatively inexpensive repair ...probably cost between $100 and $200 ...depending on whether the tensioner needs replacing.
You really need to get this fixed. If the serpentine belt fails ...it breaks or comes apart ...you will lose power steering and the water pump as the two critical accessories the belt operates. Obviously the loss of power steering can make the car difficult to drive and the loss of the water pump will cause an engine overheat condition fairly quickly. The A/C and alternator will also drop off line but these aren't as critical as the steering and water pump.

1998 Pontiac... | Answered on Jun 26, 2014


If you have never replaced your O2 sensors it is well past time. The normal service life for O2 sensors is generally 60-75K. Your vehicle probably has a good 200K which means you should replace all of the oxygen sensors. These sensors are a major input to the engine management computer ...specifically providing info about fuel mixture. When the O2 sensors fail they provide bogus information; replace them all and you'll find your Bonny will run a *whole* lot better.

1998 Pontiac... | Answered on May 03, 2014


ok so throwing parts at it might fix it but more than likely you have an issue with coolant seeping into the intake from the upper intake manifold (its plastic) where the EGR tube connects to the upper manifold. There is a new updated intake for those engines, which has a bigger diameter where the tube connects, (the tube burns thru the plastic).
check which cylinder is misfiring (P0301 indicates cyl. 1 and P0302 cyl. 2 and so on) and the pull the plug where the misfire indicates and see what it looks like. Check coolant levels to verify no coolant is internally leaking in to the engine. If this is the problem you need to have it repaired immediately or risk hydro-locking the engine. If this is the case you will need to pull all the plugs and replace them, but before installing the new plugs, be sure to crank the engine over about 3 times to expel all the liquid from the cylinders.

1998 Pontiac... | Answered on Apr 25, 2014


I am sorry we do not have that diagrams. It is copyrighted unless it is posted at another site.

1998 Pontiac... | Answered on Apr 17, 2014


CPS on a modern vehicle is the main input to the engine management computer to determine spark advance. If the CPS is toast then the EMC is not getting a good input to adjust timing.

http://engine-codes.com/p0336_pontiac.html

1998 Pontiac... | Answered on Apr 13, 2014


The thermostat could be stuck open. Remove the cap when the the motor is cold. Start the engine and look in hole to see if the coolant is flowing if it is then replace the thermostat.

1998 Pontiac... | Answered on Mar 31, 2014


Is the check engine light on ? Have you checked the throttle plate to see if it is not closing, the idle air control valve, and if you have any vac leaks ?

1998 Pontiac... | Answered on Mar 04, 2014


adj your hood or replace the switch

1998 Pontiac... | Answered on Feb 26, 2014


could be loose ground or positive cable

1998 Pontiac... | Answered on Jan 11, 2014


Could b a bad tps or a clogged air filter

1998 Pontiac... | Answered on Jan 08, 2014


Tps sensor could b at fault

1998 Pontiac... | Answered on Jan 08, 2014

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