Howdy, from AZ. I'm new here. Need to know how reset my pcm?? Just bought a 2004 Town Signature CREAMPUFF / 102,000 miles on it.. Programmed 2 new key fobs and the car went nuts. First rough low idle, then HIGH revs, back to low rough, HIGH, low, etc. No brakes, shuts off. BEAUTIFUL CAR needs help !!! Thanks to all.