2000 Buick Lesabre Runs Rough

2000 BUICK LESABRE
80,000 MILES • 6 CYL • FWD • AUTOMATIC
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THREEGZ
  • MEMBER
  • 1 POST
No fire to #3 & # 6 cylinders. Changed coil no difference.
Feb 23, 2010 at 8:30 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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.
Feb 23, 2010 at 8:42 PM
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