Question about 2002 Pontiac Grand Prix
Also an allignment.
Get all your motor and transmission mounts checked to see if any of them are wore out.
Posted on Jan 17, 2013
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Posted on Jan 02, 2017
SOURCE: Check tire pressure warning
check tire pressures with a gauge and set to the specs either in door jam or in glove box. your car must be equipt with tire preasure monitoring system so the sensors are inside the wheel normally part of the valvestem.
Posted on Mar 28, 2009
SOURCE: weird noise in front of car
How would changing the rear pads fix a noise in the front? Take the front wheels off and look for excess rust on the discs or grit in or on the pads. It sounds like you might be competent enough to take the calipers off (it's not very hard). If the noise gets louder with speed, it could very well be the bearings. This is much harder to do yourself (yay FWD), and you might want to get it towed so you don't damage the hubs, etc. Just shaking the wheel probably isn't enough to diagnose bad bearings.
Posted on May 11, 2009
SOURCE: Low tire pressure warning
most pontiac grand prix are equipted with a tire calabrater.. with this system the car recognises your tires losing air even to the .014 degree to reset this reach up under the steering consol and there sould be a yellow button to recalibrate the tire pressure.. make sure ALL tires are at desired infflation before hiting this button
Posted on Jun 25, 2009
A code “multiple misfire” may mean that one or more of the following has happened:
•Faulty spark plugs or wires
•Faulty coil (pack)
•Faulty oxygen sensor(s)
•Faulty fuel injector(s)
•Burned exhaust valve
•Faulty catalytic converter(s)
•Stuck/blocked EGR valve / passages
•Faulty camshaft position sensor
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Posted on Feb 01, 2010
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