Ok so when the car "learns" its idle, is that information stored on the ECM itself, or the PROM chip? After doing a forced Idle relearn using an old piece of GM service equipment. My car was idleing well for a few days now its right back to its old bs, reving super high at startup and slowly coming down, high idle coming to a stop. its like the car forgets how to idle. Wtf. I have these 2 chips, one my stock TGP, one a 2.8 cutlass supreme, and i cannot remember which is which, lol, whats the "Stock" TGP Prom code? Is it ATSN or AUAF? Im running out of ideas, lol. Right now i Have a "Free 195" Chip from Skalor, its served me well and i cant complain, i may just live with the drivabilty for the performance, if I can deem thats the issue.
AUAF is a TGP bin. ;) Is your SES light illuminated?
Have you checked for vacuum leaks?
Ok put the stock chip in, all the idleing high is gone. Now it just does the Classic TGP random stall at a stop. And now when its cold it hesitates and jerks from a stop, it clears up when its hot. Wtf? Maybe ill try a stock PROM and a difference ECM