Why the rough idling?

Tiny
AJBTRUGREEN
  • MEMBER
  • 2002 PONTIAC GRAND AM
  • 6 CYL
  • AUTOMATIC
  • 132,000 MILES
Why does my 02 grandam gt have rough idling and seems to misfire ever since I changed my gaskets?
Tuesday, December 7th, 2010 AT 4:22 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine running rough or misfiring can be cause by the following:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs
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.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

Note: If it doesn't apply disregard it-
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Tuesday, December 7th, 2010 AT 4:30 AM

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