1997 Pontiac Firebird Misfires

1997 PONTIAC FIREBIRD
120,000 MILES • 6 CYL • 2WD • AUTOMATIC
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ETRUIZ99
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  • 1 POST
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?
Mar 27, 2010 at 10:47 PM
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RASMATAZ
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  • 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.
Mar 28, 2010 at 1:23 AM
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