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Can not turn off the engine

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Old Sep 10, 2007 | 10:35 PM
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From: san carlos CA
Default Can not turn off the engine

After driving the 68 for a short while and back home in the garage, turn off the key, but engine still running (will not turn off), this just happened and did not happen before. after killing the engine, have the ignition switch off and disconnected and with the battery re-connected, the car have power again even with out the ignition switch connected. Have taken the alternator power off and regulator connector off, re-connect the battery, there are still power, any idea what happen? Bad ignition switch? or ? Tested on the bench with Ohm meter, the switch seem to work fine, please advise!

Thanks
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Old Sep 11, 2007 | 12:04 AM
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
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Do you have an MSD ignition ?
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Old Sep 11, 2007 | 12:58 AM
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NO, just a mallary distributor with a regular coil, I even disconnected the distibutor, it still have power. Can not figure this out at all!
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Old Sep 11, 2007 | 11:28 AM
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Anyone can suggest anything here, really would like to drive the car again!

thanks
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Old Sep 11, 2007 | 11:53 AM
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ignition linkage in the steering column.
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Old Sep 11, 2007 | 11:53 AM
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Did you try to remove the wire from the R terminal on the starter solenoid?
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Old Sep 11, 2007 | 12:04 PM
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From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
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Originally Posted by vette blue
ignition linkage in the steering column.
not on a 68, key is on dash

do you mean you tested the ingnition switch ? if so how
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Old Sep 11, 2007 | 12:46 PM
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no, have not try the the terminal at the starter. will try that.

I tested the switch on the bench with Ohm meter, all the terminals seem like working and I can turn on and off the connection when you turn on and off the key.
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Old Sep 11, 2007 | 01:15 PM
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There are 2 power wires going to the coil-one from the ignition switch and one from the R term. at the starter solenoid.If the solenoid is shorted you will get power straight from the battery.Just remove both wires from the pos. term. of the coil and see which one has power.
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Old Sep 11, 2007 | 03:50 PM
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I will try this afternoon. Thanks i hope it will work.
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Old Sep 11, 2007 | 11:59 PM
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Had the same problem a year ago. I blew a diode in the ignition switch. Since it was my mechanic that traced the problem he wired an external diode on a wire next to the alternator. To do a proper fix would have been expensive since the steering column would have to come out.
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Old Sep 12, 2007 | 12:12 AM
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From: san carlos CA
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DWncchs;

thanks for the suggestion, It was a bad starter solenoid, the R terminal shorted to the power lead inside the solenoid. replaced solenoid, things are working again.

Thank you again for your help.

Thanks everyone for your suggestion.
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Old Sep 12, 2007 | 02:08 PM
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You Welcome glad it worked out.
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