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2002 Buick Century

Tiny
MARCIAR
  • MEMBER
  • 2002 BUICK CENTURY
Engine Performance problem
2002 Buick Century 6 cyl Front Wheel Drive Automatic

We have a 2002 buick century we changed the spark plugs, wiring. The code that came up was #2 cyclinder miss firing. Change the coil pack. Now the code is multiple miss firings. The missing seems to be around 20mph and 30mph. It also does not do it when the engine is cold. Can yuou help?
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Wednesday, April 21st, 2010 AT 6:00 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine running rough or misfiring can be cause by the following-inspect and test all the following 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.
11. Idle air control valve.
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Thursday, April 22nd, 2010 AT 5:03 AM

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