1997 Pontiac Grand Am Runs really rough

1997 PONTIAC GRAND AM

182,000 MILES • 4 CYL • FWD • AUTOMATIC

SHYGMICHIGAN

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I have started having this problem about two months ago. I leave my car sit over night and in the morning it runs really rough. Twice my car has stalled and the battery light came on. I already changed the throttle position sensor, the air sensor, the coolant temperature sensor, the fuel filter and the fuel pump. Can someone please help?

Mar 23, 2010 at 7:45 PM

RASMATAZ

CAR REPAIR CONTRIBUTOR
75,992 POSTS

Hi shygmichigan,Welcome to 2carpros and TY for the donation.

Engine running rough or misfiring can be cause by the following-inspect and test all the following below:
1.Defective spark plug.
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.

Mar 23, 2010 at 8:55 PM

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