I have a 2006 Cobalt SS Supercharged 2.0 LSJ Ecotec, the car is bored twenty over and has just started the tuning process. My compression is still stock and I had to go with bigger pistons in order to repair the cylinder walls from a tune that cracked my stock pistons. So now I'm trying to do it myself so I know its right.
I have managed to get a rough idle with a descent afr by changing my airflow RPM vs HZ to match the increased airflow due to the larger pistons but anything above idle becomes unstable? attached is the log file. Please try to be specific as I've done alot of reading but experience is null.
Thanks!