2000 Pontiac Bonneville Runs rough

Tiny
TECH1713
  • MEMBER
  • 2000 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 144,000 MILES
Engine runs rough at idle poor fuel economy
Saturday, March 6th, 2010 AT 9:57 AM

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.
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Saturday, March 6th, 2010 AT 7:29 PM

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