i've got a 2003 gt with all the basic bolt ons, intake,tb,maf,exahust,etc. pretty much everything to help airflow, plus a predator tuner. the car had been running great aside from idleing a little high (about 1200 rpm) every once in a while, this started after i installed my 70mm throttlebody. i went out to the track recently and made a few hard runs and ever since then it does not idle correctly, every time i come to a stop the idle gets stuck from about 1200 to 1500 rpm and i have to rev to engine past 3000 to get it to drop back down to 700 rpm. this happens more often with my a/c on. i am suspecting a faulty tps sensor but i'm not sure, does anyone have any input on what might be my problem? also i have scanned it for trouble codes with my predator but it's not showing any codes. thanks.