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2002 Ford F-150 Idle rough

Tiny
JEFF BURLESON
  • MEMBER
  • 2002 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
The truck runs fine for a while. May run fine for 20-30 miles then starts idleing rough. Will not start after that until it cools off. Changed the fuel filter. What do I need to look at next?
Sunday, July 11th, 2010 AT 8:24 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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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Sunday, July 11th, 2010 AT 7:14 PM

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