1997 Pontiac Firebird Misfires

Tiny
ETRUIZ99
  • MEMBER
  • 1997 PONTIAC FIREBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
Vehicle started misfiring about a month ago. Check engine light comes on and blinks. Has previously had this problem and solution has either been a fuel injector or a coil pack or arching in the spark plug wires. Already changed all fuel injectors, coil packs and spark plag wires. Problem has gotten smaller but still misfiring. Will change plugs now. Any other suggestions?
Saturday, March 27th, 2010 AT 10:47 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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. Throttle position sensor.
11. Idle air control valve.
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Sunday, March 28th, 2010 AT 1:23 AM

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