its not really a idle reset, its a stop reset
in stock form, you get the engine nice and hot
disconnect the SPOUT, idle is actually set by timing by the ecm the IAC is for transitions and loads, then disconnect the IAC
get the engine to idle as low as posssible, 500-550rpm by backing the adjusting the stop
then erase the KAM, disconnect the battery step on the brake pedal
restart, goose the engine a few times
then wait for about 100 start cycles at different conditions, idle will learn
this may work or not, its only chance is with a totally stock engine.
89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.