This has been stumping me for a bit now and need help. I have a 91 z28 with a 305 tpi. It started with the car starting up fine but when I went to turn it off it stayed on even with the key out. The motor stays running and all the power is still on. I had to pull the battery to stop it. With the battery in it powers up but now won't start. The security light stays on. No gas and no spark. I tried the resister bypass but still no go. I also tried replacing the steering column and all its parts but still no change. Any ideas out there