RUNNING ROUGH

2002 Chevrolet Avalanche

Tiny

kodidog

January, 2, 2011 AT 11:05 PM

02 avalanche, 116k, 5.3L, z71, 4x4. No previous problems, this week it has been starting to run rough at times. Then today suddenly stalled while out. Tried starting but wouldn, t start at first, just kept cranking. Then after a few started but ran rough then seemed fine.

FOUND 4480 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

1 Answer

Tiny

rasmataz

March, 17, 2011 AT 10:19 AM

Engine running rough or misfiring can be cause by the following:

http://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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