I have an 89 Oldsmobile Cutless Supreme with 110k that I have been having trouble with. I had trouble one day while driving the car I excellerated and the car died on the road. The car would not start. The car was towed home and it started the next morning but when shut off it would not restart. I had a new muffler system from front to back put on, a new fuel pump, and filter put in. The car ran for about 1 week without problems and then it died once again, this time never to start again. I took it to a mechanic who had it for about two months unable to find the problem. They believe the problem is electrical, not the computer. They put in a known working computer and it still would not start and checked all codes came up clear. There is spark at the plugs and the fuel is reaching the injectors, the engine will crank but will not start. When I was at the mechanic shop two other cars Identical to mine came in with the same problem in the same situation the cars just quit while running. I did notice before the car started with this problem that the engine was idleing high then low. Any help would be greatly appreciated. Thanks.