Truck

Tiny
JAMIESS68
  • MEMBER
  • 1999 GMC SONOMA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 144,000 MILES
Engine lite on, auto zone says they cant read? Truck runs rough at idle, 99 gmc sonoma v6
Sunday, January 30th, 2011 AT 12:38 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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Wednesday, March 16th, 2011 AT 9:42 AM

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