RUNS ROUGH

2000 Pontiac Sunfire

Tiny

alleycat

July, 17, 2010 AT 5:41 PM

Engine Performance problem
2000 Pontiac Sunfire 4 cyl Front Wheel Drive Automatic 98000 miles

2000 Pontiac sunfire runs rough and the catalytic converter gets red any ideals what could cause this problem

FOUND 4487 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

1 Answer

Tiny

rasmataz

July, 17, 2010 AT 7:35 PM

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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