running rough

2002 CHEVROLET AVALANCHE
116 MILES • 6 CYL • 4WD • AUTOMATIC
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KODIDOG
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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.
Jan 2, 2011 at 11:05 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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-
Mar 17, 2011 at 10:19 AM
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