one day my truck ran fine, then the next day it started missing. i replaced spark plugs,wires,distributor cap, and rotor,but still won't run right
May 17, 2010 at 12:04 PM
RASMATAZ
✓Experienced Mechanic
75,988 POSTS
Engine running rough or misfiring can be cause by the following-inspect and test all the following below:
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.Idle air control valve.
11.Throttle position sensor.