Originally Posted by 95naSTA
Umm thats bad. REAL bad. Are you sure it'* negative?
Yessir.... timing advance at idle and while cruising is a negative number. However, it goes to the positive side when I reach WOT. We just don't think it'* going far enough into the positive. The car is a little weird right now, so we're going to post scan results shortly.
I purchased the Enhanced GM upgrade for my AutoXray, so now I can see KR, A/F ratio, and a bunch of other stuff. I have no idea if my STFT and LTFT are where they need to be, but we know it'* running pretty lean at times, because yesterday it actually set a CEL with the code "Bank 1, System Too Lean"
. The car is parked right now, because I don't want to burn up a piston or anything.
However, we're not getting KR at WOT. We are
seeing some KR at low RPM while accelerating under load. It'* crazy, and I'm not sure what to think. The important thing is that we're going to get a scan of the car and post it here, so you tuning gurus can give me an idea of what'* happening. I also believe I have a vacuum leak due to a cracked rubber fitting on the vacuum lines, so it may be contributing to the weirdness.
We will post scan results later today.