Car will not shut off

[Mike80911]

I started my 88 the other day and drove for about an hour. All was fine until I got home and went to shut the car off I could not shut the engine. I removed the key and sat there for about 5 mins and the engine just kept running. All of the electrical items shut down, the tach shuts down and all lights shut down but the car keeps running. I finally pulled the coil wire to shut it down. Since this has happened I have started it several times sometimes it shuts down sometimes it does not. Has anyone ever run across this problem before? Any suggestions and what and how to check?
Thanks

[Chuck.H]

I'm not that familiar with the 930's, but on the 3.2's if the DME relay sticks in the closed position you may have this problem. But I have no idea on the turbo's.

Chuck.H
'89 TurboLookTarga, 342k miles

[mmari270]

I had an issue where mine would not start and searched for "ignition problem". I read that the electrical portion of the keyed ignition switch goes bad. One guy gave the same issue where his car did not shut off.

[Nickshu]

Sounds like a bad ignition switch. Not an uncommon issue.

[bigel]

I had a dream like that once.

[Mike80911]

My first guess was a bad ignition switch also I guess I will buy one and start from there. Hopefully that solves this. Thanks for the replies and advice

[Nickshu]

Here ya go:

Pelican Technical Article: Replacing your Ignition Switch - 911 (1965-89) - 930 Turbo (1975-89)

[dshepp806]

Yeap: ignition switch.

Doyle

[kidrock]

quick note if the PO decides to replace the switch: the "nut" that holds the ignition switch onto the steering wheel lock is actually a locking nut, which locks an allen set screw (4mm, IIRC). Just loosen the nut, don't remove it. Then follow up by loosening the allen head set screw.

Also: I found that removing the steering wheel made the job of hacking the shear bolts a whole lot easier. I also found that drilling the middle of the shear bolts went faster and cleaner than cutting or grinding them with a Dremel tool.