My 95 LT1 wouldn't idle, it kept stalling. Found three things wrong. IAC counts were up in the 80's, TPS was too high and knock sensor was bad. Replaced KS. Used Datamaster to recalibrate the IAC counts to 40 and TPS to .67. Problem is that now the car is idling at 1800 rpm and this after it warms up. How do I get to come down. Please don't tell me I need tuning software.

Thanks

 

What kind of mods have been done to it? Are you sure IAC counts are back around 40? when it is at 1800? If so, any vacuum leaks?