1999 Mazda 626 check enging light

Tiny
THETREEMAN
  • MEMBER
  • 1999 MAZDA 626
  • 6 CYL
  • FWD
  • MANUAL
  • 200,800 MILES
I got a check engine light on my car I brought it to autozone to check it. They told me it is miss firing what does that mean ? They said a tuneup
Monday, June 21st, 2010 AT 1:15 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, June 21st, 2010 AT 8:11 PM

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