94 z28 Camaro need help misfiring and back firing
11-17-2012, 09:10 PM
#1
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94 z28 Camaro need help misfiring and back firing So I just got the car a week ago and this is whats it doing..,I start it in the morning cold start runs great no issuse until it wrams up to operating temperatures then starts to misfire and backfire.. engine light will come on in a few min after the car will die down then just up to 1500 and run just fine I have a buddy telling me opti but if it was the opti wouldnt it do it all the time... Im think o2 sensor could I be wrong...,also I changed the icm amd coil already
11-17-2012, 09:44 PM
#4
Thats typical with a lot of PCM's.
Can you get a scan while the engine is running to see how the 02 sensors are switching???
If not....just buy an 02 sensor locally and try it. If it doesn't work you can always bring it back and just tell them it doesn't work. A dud......lol
.
Can you get a scan while the engine is running to see how the 02 sensors are switching???
If not....just buy an 02 sensor locally and try it. If it doesn't work you can always bring it back and just tell them it doesn't work. A dud......lol
.
11-18-2012, 01:10 PM
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Oh btw I dont know if this helps but when it was,backfiring and misfiring only 4 of the injector were working on passenger side I had all four unpluged on driver side and it didnt change anything???
