I have a 96 Mustang GT with a K&N Filtercharger kit and Flowmasters. Other than that it is stock. The car has approx. 125K miles on it. It goes through regular maintenance by myself, for the most part. It has been to Ford due to bad tranny and had to be replaced a few years ago. The car has been running ok. This morning, the wife starts the car and out of the blue it starts to hesitate badly. She calls me with her cell to tell me the car isn't running right and I hear it in the background. She has to keep the rpm up or it stalls. She got it home ok using the brake and keeping the idle up. When I get home, I start it up and get the same thing. :shrug: When I get it to start, I raise the rpm up to 5k and ease it back down to approx. 600 rpm before it starts to stall again. I did this several times. As long as I keep the rpm up it's fine. If I take my foot off the accelerator, it stalls immediately. :cuss: So what do you folks think it is ? Could it be a bad TPS ? What about fuel pump ? The fuel filter hasn't been changed in 50k miles. I don't have anyway to check for codes unless someone can tell me a way to do it by turning the key off and on a certain number of times, etc.. I appreciate any help you guys can offer. I have to get this thing running so the wife can get to work. Thanks for your help !! ;-)