I just bought my mustang off a guy who has done a lot of work to the car and I think a lot of bad. I have hooker header running exhaust all the way back with no 02 sensor ports no cats ,nothing. I lways have the check engine light on and cant even get a sticker for the car. First gear is soo damn slow and raises the rpms soo high i think the car is gonna blow up on me. the car came wiht a sct tuner that has been noted to be out dated and none of the tunes on there work . I dont think the tuner was for this car. for a v8 i think the car should have some heart. PLEASE someone e-mail me at mjdaily@yahoo and tell me what i should do. the idle hangs and i already replaced the iac. just bought a new tps but dont think that is the issue. i know nothing about mustangs and really need some help.