Mechanics

RUNS ROUGH

2000 Pontiac Sunfire

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
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Alleycat
July 17, 2010.



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.

Rasmataz
Jul 17, 2010.


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