I put an 85 Bonneville dash in my 1985 el camino... now the job's done and the car sounds like it's running on 3 cylinders. I suspect the ECM but don't have a clue what to do. I kept the El Camino ECM and pluged the GP dash harness into two connectors next to the ECM (one was about 5 pins and the other about 8). Start the car up and it's is like a thrashing machine running on about 3 cyclinders...any ideas what I did or didn't do? Phone is 727-452-4814 if you care to call me. Thanks Al