Well, I am new to the forum, and also a new Camaro owner. I got the car a few weeks ago, everything was fine. One day the car began noticeably misfiring, so I took it to Autozone, had them run the codes, and I replaced the #1 Spark plug. This solved the misfire problem. Well, a week or two later I was driving on the freeway and noticed a slight misfire, which in a matter of two miles turned into a noticeable, jerky, misfire. I ran the code again, put a plug in #1 again (the first plug I put in it was NOT iridium, I thought that may have cause the plug to fail). After replacing the plug with an iridium plug, I still have a horrible misfire.

The car has new plugs and wires, 2 new coil packs, and 1 New injector.

I am somewhat lost as to where I should go from here.

My thoughts are: maybe a fuel filter? maybe a bad injector?

How can I test the injectors?

Any help is greatly appreciated. This thing is nothing like my 84' Chevy with a 5.7L

 

I would replace all plugs and wires at the same time, and carefully route wires, then you have a baseline. Are they now all new plugs/wires?

What are your current code #s? You can NOID test the injectors.

 

First, thanks for your reply.

Previous owner replaced all plugs and wires. Wires still look brand new. The #1 plug I pulled the first time when the misfire occurred didnt look too bad, it wasnt wet, and it wasnt burnt, it just had a reddish coloring on it. I'm not sure what would cause the redddish coloring.

I forgot the code # =\ but both times it was a cylinder 1 misfire reading. I will recheck the code this evening and post it.

How would I go about NOID testing? I am pretty newb when it comes to electrical/injection.

On another note.. out of desperation I checked the fuse blocks under the hood, many fuses were mismatched, and one of the fuses "Inj. 2" was missing. I checked ALL fuses and replaced them with the proper amp fuses. This did seem to help the misfire a great deal, and now it is less noticeable unless accelerating or idling.

Thanks again.

 

If the Inj 2 fuse is not used in your application.

 

There are fuses in the driver side of the dash too, by the door, btw.

Your issue is most likely a plug, wire (routed right? not grounding out on anything?), coil pack or injector, it it's focused on one cylinder...

Now, if you used some good plugs, maybe it would work better hahahaa:


A reddish plug is shown here:


Pickup a cheap Haynes or Chiltons manual for your Camaro if you don't have one yet, most parts stores stock them. Some include a CD/DVD for your computer too.