ROUGH IDLE

1997 Ford Ranger

Tiny

Kent1959

July, 17, 2010 AT 7:49 PM

Engine Performance problem
1997 Ford Ranger 6 cyl Two Wheel Drive Manual 180000 miles

my 97 Ranger has a rough idle, idles slow then races up a bit then slows again

FOUND 2374 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

July, 17, 2010 AT 7:53 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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