1983 Ford F-150 missing

THUNDER68

MEMBER
1983 FORD F-150
6 CYL
2WD
AUTOMATIC
171,000 MILES

I change plugs and wires when in park it runs fine when in gear it has a very bad miss

Sunday, August 8th, 2010 AT 9:21 AM

1 Reply

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.