2001 Audi TT Question engine missing

Tiny
APRIL MORGAN
  • MEMBER
  • 2001 AUDI TT
  • 4 CYL
  • AWD
  • MANUAL
  • 120,000 MILES
I replaced new plugs replaced with new coils replaced new o2 censors and new catylate converter what am I missing I need help
Sunday, August 29th, 2010 AT 2:47 PM

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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Monday, August 30th, 2010 AT 2:41 AM

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