I've got a 99 M6 car that only has stock MAF, LS6 intake, 2.02 heads, 224/224 cam, headers and exhaust. I have performed auto VE tune however instead of remaining in speed density I have returned to MAFcontrol.
Before and after auto VE tune I have been having cold idle/surging issues. After auto ve tune the problem is worse. When outside temps is ~70 deg F, with car cold. IAC counts will start at ~120 then move to around 65 as car warms up. If I touch throttle at all car starts suring badly and will stall. Someone suggested bumping up timing. I'm seeing around 13-20 Deg of timing when car is idleing. I set the 4 primary tables (high octane spark map, low octane spark map, base spark in park/neutral and base spark in gear). I have set all the associate airflow and rpm cells for idleing to 28 deg. The car still will idle around 13-20 Deg of timing.
Can anyone direct me to the idle timing tables. I search and found many different timing tables that all "ADD" together to come up with a timing value. How do I troubleshoot this issue.
thanks,