Rough running when cold

Tiny
DOUG JACCARD
  • MEMBER
  • 1997 PONTIAC GRAND AM
  • 4 CYL
  • 2WD
  • MANUAL
I failed to mention the car has 202550 miles.
Monday, December 13th, 2010 AT 12:31 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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Monday, December 13th, 2010 AT 1:04 AM

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