Car won't Shut Off

[dclark@xxxx]

My DeLorean loves to run so much that today when I stopped to get gas 
and turned the key to shut the car off it decided it would keep 
running. Not the sputtering, bad gas type of running but a smooth 
idle as if the key had not been turned. I took the key all the way 
out and the car just purred like it was still in the ignition. I 
drove it home and used the clutch and brake to kill the engine. I 
took the key out and the radiator fans and warning lights were still 
on as if the car had just died but the key was still in.

I went inside to get a flashlight and dig around in the relay 
compartment to see if there was something I could do. About the time 
I removed the relay cover (about 5 minutes) the car shut itself down 
as if the key had just been turned off. I restarted it and turned it 
off when no problems.

Anyone know what my problem may be?

Thanks
derric