Originally Posted by
06cobaltss/sc
The throttle body has been cleaned, but is 100% stock and working properly. At idle, ALWAYS the car has negative timing. I will put up a scan of the car to see if it helps. The tune won't help much, because I can change the high octane / low octane timing all I want, and it doesn't change anything. I can also adjust the idle spark advance to all 10s or all 15s and nothing changes. I just adjusted the tune again, I will see if it changes and will report back with a log.