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Vette runs after shut off....

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Old Feb 1, 2006 | 09:40 PM
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Default Vette runs after shut off....

Hello, I have a 1977 Corvette 350/4 speed when I shut the car off the engine continues to run for about 30 seconds with gen light on before finally shutting off. I did install an electric fan.. one wire grounded to frame and the positive is run right off of the ignition wire to the distributor. Fan shuts off but engine doesnt for approx 30 seconds. Any help would be appreciated..Thanks, Bill
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Old Feb 1, 2006 | 10:01 PM
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Timing is too advanced - retard it a bit. How is your operating temperature; a bit on the high side?
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Old Feb 1, 2006 | 10:16 PM
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The car is running normal after the key is turned off. Its not bucking its running smooth I know it sounds crazy. The temp never even reaches 200.
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Old Feb 2, 2006 | 12:05 AM
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In that case you may need a new ignition switch.
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Old Feb 2, 2006 | 12:22 AM
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Bill,
I've seen this before. You need a different hot source for the positive side. The positive is being fed by the ignition lead and the engine will continue to stumble on uintil the fan stops spinning after you key off.
Want to check it? Unhook the fan positive lead and see if the car shuts off normally.
Good luck,
Greg
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Old Feb 2, 2006 | 11:51 AM
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Originally Posted by Greg
Bill,
I've seen this before. You need a different hot source for the positive side. The positive is being fed by the ignition lead and the engine will continue to stumble on uintil the fan stops spinning after you key off.
Want to check it? Unhook the fan positive lead and see if the car shuts off normally.
Good luck,
Greg
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Old Feb 2, 2006 | 11:54 AM
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I had a similar problem after installing an MSD igntion. I needed to install a diode (electrical checkvalve) in the alternator line. No problem now. This may work for you too.
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Old Feb 2, 2006 | 02:09 PM
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Thanks guys for all your help! I rewired the fan today and that fixed the problem. Thanks again, Bill
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