Hello, I have a 99 GT, and it always falls on its face when idleing. Can the idle setting on the computer be adjusted when doing a custom chip?? Thanks.
Car is in stock condition and a 5 speed.
Before trying that I would do a system reset just for kicks. Disconnect neg batt cable & let sit that way for 15 minutes. Then reconnect & crank engine. That could work but I wouldn't bet on it. My theory lies in that internal computer somehow lost your correct a/f ratio & must re-learn it.