I was a GM tech for nearly six years and have set the timing on more than one vehicle, however it seems the base timing should, with the esc wire unplugged, read zero on live data, it doesn't. I'll get a formal datalog posted when I get to WiFi again. I still haven't ordered my BURN2 as I am trying to make sure my first marriage anniversary (today) has sufficient funds first, so can't upload my BIN yet. I'm positive that the timin light was on the number one cylinder. Gotta be something strange going on here. Also I had an idea, the truck dies while idling at or below 5-7 of timing. Also the throttle responce is sluggish to say the least. Is it possible that I just need to reset the IAC, that it isn't open enough and retarding the timing is causing it to flood out? Or maybe that my underlying cause is an overly rich condition that the computer is covering up by advancing the timing?
edited due to lack of punctuation and many fat fingered misspellings. (Don't you just love typing on a phone?)