Mechanics

CHEVY ROUGH IDLE

1998 Chevrolet Venture

Engine Performance problem
1998 Chevy Venture 6 cyl Front Wheel Drive Automatic 120000 miles

what could cause the motor to rough idle besides the coil packs and plugs/ wires
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Shawnzzz
June 30, 2010.



Do you have a check engine light and when was your last major tune-up?

The following below could cause it

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
Jun 30, 2010.