2000 Pontiac Sunfire runs rough

Tiny
ALLEYCAT
  • MEMBER
  • 2000 PONTIAC SUNFIRE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 98,000 MILES
2000 Pontiac sunfire runs rough and the catalytic converter gets red any ideals what could cause this problem
Saturday, July 17th, 2010 AT 5:41 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.
10. Throttle position sensor.
11. Idle air control valve.
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Saturday, July 17th, 2010 AT 7:35 PM

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