2006 Chevy Avalanche rough idle

Tiny
GATEWAY13
  • MEMBER
  • 2006 CHEVROLET AVALANCHE
  • V8
  • 4WD
  • AUTOMATIC
  • 55,600 MILES
My 2006 avalanche idles roughly at red lights, stop sign and when in park.
Friday, July 30th, 2010 AT 9:08 PM

1 Reply

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

1. Defective spark plug
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. Idle air control valve.
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Friday, July 30th, 2010 AT 9:13 PM

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