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1993 Buick Lesabre

Tiny
COUNTRYBOY101
  • MEMBER
  • 1993 BUICK LESABRE
Engine Performance problem
1993 Buick Lesabre 6 cyl Front Wheel Drive Automatic 160, xx miles

my wifes car runs really good for about 30 minutes when its cold, but warmed up it misses really bad and will barely pull itself. When you stop at a stop sign and take off it back fires and barely pulls itself. Can it be a sensor or maybe ignition module breaking down. Its got me puzzled
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Monday, March 8th, 2010 AT 7:41 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine running rough or misfiring can be cause by the following:
Inspect and test all the following listed below.
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
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Monday, March 8th, 2010 AT 8:08 PM
Tiny
COUNTRYBOY101
  • MEMBER
  • 2 POSTS
I have changed all spark plugs and wires and the 3 coil packs. When the engine is cold it runs great, when it warms up it misses and runs like crap. You think I might need to change the oxygen sensor?
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Wednesday, March 10th, 2010 AT 8:34 PM

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