Bill's 02 Z-28 SS

Hi Folks
I went to the track Sunday and had a strange problem. I made my first run, everything looked Ok, went back to the pits and turned off the car. Once I restarted the car for my second run - about 40 minutes later, my SES light was coming on - sometime it would stay on - had to clear it many times. I was setting P0300 engine misfire detected and P0355 Ignition Coil #5 Control Circuit. Made the run anyway - maybe I should have not but oh well. Back in the pit could hear popping in the exhaust once in a while. I left the track to go home because it looked like I was running on 7 cylinders. Going home doing 65mph - NO CODES, SES off. It has not shown up again - I tried to see if it would happen again - no way. What would it show up, bad coil? At the track, I checked the plug wire, electrical connection, everything looked good. What could it be Coil, wiring, PCM, Spark plug or wire, values, head gasket???
Thanks

Bill

WILWAXU

iTrader: (6)

Try swapping the coils around. See if the code follows the coil.

Bill's 02 Z-28 SS

Hi
the problem is the error has gone away and has not returned. I am afraid if I go to track again, the error may happen when it is WOT - I will not see, just focusing on the RPMs and shifting.
Thanks
Bill

WILWAXU

iTrader: (6)

I would check all the coil connections first, even if the code has went away.