1994 Ford F-150 MISSES

Tiny
D.D.
  • MEMBER
  • 1994 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 40,000 MILES
NEW ENGINE, MISSESAT IDLE, &OCCASIONALLY CUTS OUT FOR A SPLIT SECOND AT HI SPEED, GETTING WORSE & CODES ERASE BEFORE I CAN GET TO A SCANNER, RESCENT TUNEUP, NEW DISTRIBUTOR, EGR VAL. THROTTLE P. SENSOR, O2SENSOR (OLD ENGINE WITH 397000ACTUAL MILES, MISSED OCASIONALLY AT IDLE ONLY!)ANY IDEAS?
Wednesday, July 28th, 2010 AT 1:30 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.
12. Engine compression problem
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Wednesday, July 28th, 2010 AT 1:38 AM

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