2000 Buick Lesabre Runs Rough

Tiny
THREEGZ
  • MEMBER
  • 2000 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 80,000 MILES
No fire to #3 & # 6 cylinders. Changed coil no difference.
Tuesday, February 23rd, 2010 AT 8:30 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.
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Tuesday, February 23rd, 2010 AT 8:42 PM

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