I put a cc503 and the supporting valvetrain in my 95 Camaro lt1 a few weeks ago and I'm playing with the tune. I have my idle set at 800 in drive and parking. iac counts are a solid 30-40 in idle at park. however, when I put the car in reverse or drive it bogs down to 400-600 rpms and the iac counts jump to 90. any idea what's happening?

 

try setting idle rpm at 850