Hello, and thank you for reading this. I just bought a 97 Deville Concours with a flood damage history. Needless to say, I am experiencing computer related problems. The biggest one is that it shifts rough, slips, and has a fast idle. Originally the speedometer did not work, so I believed that because the car was computerized, that the transmission's performance was based on the speedometer. I changed the speed sensor, and I just had a new guage cluster installed at the dealership. Now my speedometer works (my odometer is fast though) but my symptoms have not improved the slightest bit. The car has 85k miles and I am at a loss for ideas....and cash. My "sevice ride control" indicator is on too. Can anyone please help?
Thanks for any suggestions.