Running rough

Tiny
KODIDOG
  • MEMBER
  • 2002 CHEVROLET AVALANCHE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 116 MILES
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.
Sunday, January 2nd, 2011 AT 11:05 PM

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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Thursday, March 17th, 2011 AT 10:19 AM

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