Just picked up my camaro from the body shop on Saturday, as soon as I started it I noticed it was missing pretty bad. It was running great when I dropped it off about two weeks prior. So I drove it home with SES light on all the way , actually the ses light would start flashing like any time I was over 1000 rpms. Drove it to Auto Zone today and had them scan it. It came back with 8 codes. One was something to do with the air pump(it was already on when I left the car), one was 5th cylinder misfire and the others were either 02 sensor or catalytic convertor codes(I hear these are caused by the misfire code). Any suggestions on where to start? Thanks for any help.

 

Could be a loose or bad plug wire, crack ceramic on the spark plug (seen that on a friends car) or the coil may have gone bad.

You could try swaping these to different cylinders and see if the misfire moves.

 

Start with the simple stuff. Check the #5 spark plug wire.