Hey guys,
I have a 1997 camaro 3.8L V6. The check engine light is on showing a p0303 error code aka cylinder 3 misfire. I changed Plugs, plug wires, and fuel injector. the car runs GREAT except at the first few seconds u idle it at start and when coming to a stop. After i did the changes the light went off and i proceeded to run her to get emissions. as soon as i let her idle in the emission test center the light popped on and started flashing(reoccuring misfire is what that indicates i believe). needless to say it failed the test and frustrated the **** out of me. My question is this: other than a faulty coil pack what could it be. a faulty O2( if so how could it be only 1 cylinder), faulty ICM, or Cat converter?
Any help is greatly appreciated
P.S. sorry for starting a new thread on this couldn't find the old one.

 

Start at the plug and work back from there.

 

I know the basics im just looking for a bit of troubleshooting help. Thx for the response

 

swap the coil for that plug with another and see if the misfire follows

 

Yeah what basic said

 

ya what i said lol

 

What specifically, is your CURRENT code(s)?

 

My bet is on the coil pack, and yes, what Basic said.

 

Thanks for all the feedback, but after hours of frustration i took it for a compression check and it is a cracked exhaust valve on cylinder 3 =[ there goes 1000 dollars.

 

Ouch! Sorry to hear about that.