ROUGH/MISSING ENGINE

1992 Lexus SC 400

Tiny

japan748

August, 6, 2010 AT 11:31 AM

Engine Performance problem
1992 Lexus SC 400 V8 Two Wheel Drive Automatic 167, 00 miles

Runs rough/missing when engine is cold, once warm
engine runs fine.

FOUND 2124 RELATED QUESTIONS

Mis Fire -

17 ANSWERS
11 IMAGES

1 Answer

Tiny

rasmataz

August, 7, 2010 AT 2:43 AM

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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