Originally Posted by
steveo
the IAC is jacked wide open but you're above target idle, probably because your tps needs to be 0% at idle (it isn't trying to control idle at all), your TPS is 1.6%. close your throttle blades all of the way so they're almost stuck in the bore.
this may be due to a wiring fault or interference, , meaning TPS voltage may be unstable?
the LT1 ecm usually finds 0% tps by minimum voltage without issues, so unhook the battery for a bit to reset the ECM memory. then start it while giving it no throttle. it should self-calibrate.
yes, eehack 'control' section, check idle 'steps', then idle 'override', you can move the pintle that way.