Question about 2004 Pontiac Grand Prix
Yes a bad 02 sensor will cause the car to run badly. and change those plugs too
Posted on May 24, 2017
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Posted on Jan 02, 2017
im fixing what seems to be the same problem on my 92 grand prix try listening for a vacum leak when the engine is warm. my problem is the brake booster is leaking. when i come to a stop it almost stalls. i dont know if that will fix your problem but from my experience the grandprix's thats my guess. if im wrong look in the fuel injectors
Posted on Sep 30, 2009
There are 2 coolant sensors, one to control the radiator fan, and one to tell your computer how hot the engine is. They are both mounted in the engine, not far from where the upper radiator hose attaches, and where your thermostat is.
Posted on Dec 01, 2009
look a round the injectors for wet or damp spots(bad seals)...my 3800 was sucking air around seals causing it to run rich and throw codes for misfires and 02 sensors
Posted on Mar 15, 2010
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