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Posted by: chris914 Apr 29 2007, 10:34 PM

My engine keeps running after I turn it off.

My Pertronic ignition died after hooking up the adapter for the tachometer. It was working for a while. But as I was tuning the carburetors the engine stopped running and wouldn’t start again.

I disconnected the MSD and the engine still wouldn’t start. I put the points in and the engine started. Then I hooked the MSD and the engine started again. But when I turn off the key the engine keeps running

Has anyone had this problem before?

The power to the points/MSD is an original wire from the engine relay board. Should I run a separate wire from the ignition key?

Posted by: SirAndy Apr 29 2007, 10:44 PM

only if you like burning your car to the ground ...

i suspect the ignition switch. you'll fry your pertronix if you leave the key in the "ON" position.
sounds like you got a faulty switch that is stuck in "ON" which would explain why the engine keeps running and why the pertronix fried ...

got another switch you can try?

Andy

Posted by: Gint Apr 30 2007, 07:21 AM

My car was doing that when I had the timing at idle very retarded. Since you were changing stuff out it's a possibility.

Posted by: iamchappy Apr 30 2007, 07:26 AM

Power is leaking back into the system is keeping the MSD energized, a one way diode spliced into the the blue alternator wire either before the regulator or the wire running to the alternator light in the dash should solve it.

Posted by: Aaron Cox Apr 30 2007, 05:38 PM

BING BING BING... we have a winner!

Posted by: McMark Apr 30 2007, 06:20 PM

with Aaron.

Posted by: ejm Apr 30 2007, 06:38 PM

Common problem... check the http://www.msdignition.com/1troubleshoot.htm