2001 Infiniti Q45 missing

JONESLT53

MEMBER
2001 INFINITI Q45
V8
2WD
AUTOMATIC
150,000 MILES

Engine missing changed spark plug wires still missing, could it be a coil or injectors

Tuesday, October 26th, 2010 AT 5:09 PM

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. Manifold absolute pressure sensor