My 1996 Cadillac Deville concourse has developed a defect whereas it will accelerate on it's own, shutting down the A/C for more horsepower while it does it. I have seen it accelerate through 80 mph once. The condition goes away temporaily when the engine is shut off and recranked, returning at unpredictable intervals. My local Cadillac dealer refused to repair the problem, giving me a "go away and never come back speech" advising me strongly to junk the car (it's in almost perfect condition otherwise). I think I may have a 'smoking gun' car for those people who have killed, maimed, destroyed property with cars that accelerate by themselves. The dealer had the car overnight and claimed to have made no frepairs, but it has not repeated this since I got it back today. It was a chronic conditioin three days ago near the end of a 3000 mile trip. Cadiullac has extraordinary resposibilities and liabilities here for refusing to repair the car as they have made it impossible for anyone else to repair Cadillac cars, and this car is a loaded gun. I have learned to stop it by taking it out of gear, at which time, if the condition is present, the engine idles between 3000 and 4000 RPM. They have admitted to me that it is in the electronic engine controls, but steadfastly refused to be specific about it. Iu thought it very strange that they would so pointedly try to make an anti-Cadillac person out of me with their rudeness about my problem, and their refusal to perform repairs. They have always loved to take my money before.

- Bonuifay, FL, USA

Exhaust sensor failed.

- Lakewood, CA, USA