I'm pretty much at a loss... sounds like you've tried everything.


maybe try unpluging your o2 and see if it runs better.

have you set the base idle? where you ground A and B (same as checking the codes) wait a min or so with the key on but not running. then unplug the IAC and the set timing plug thing, then start the car and set the idle for 450 rpm's (500rpm"s for an auto trans).... not sure if it will help much be its something free that can't hurt either way to try.