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Old 07-16-2004, 08:35 PM
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Question my engine won't stop

hi team

I have rebuilt a 351 Cleveland, the cam is run in but the engine hasn't run anywhere yet. I have an MSD 6AL and I just put in a New MSD dizzy, model MSD 8580. When I turn the car on it runs fine but when I turn the ignition off the engine keeps running. I have to turn the fuel pump off and let it run out of gas. I had the engine stopping fine before I got the new dizzy. I have searched wiring but can't see anything. Any ideas?

thnks
koosh

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Old 07-16-2004, 08:43 PM
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too advanced and or idle is too high. Its called dieseling and is caused by the heat of the chambers igniting the charge-

K
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Old 07-16-2004, 08:47 PM
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instructions

Did you read the instructions????? of coarse not your a man and we don't need no stinking instructions!!!!!! right......

Just kidding... i only wrote that because the same thing happened to me...

The altenator is back feeding the 6al.
In the box with all the other stuff you should have a diode. this will need to be installed between the voltage regulator and the altenator.. I think, It will tell you in the paper work that came with the 6al.

keith
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Old 07-16-2004, 09:04 PM
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Yep, I won't give details, but I know for a fact that installing that diode will cure the problem!



tom
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Old 07-16-2004, 09:26 PM
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far out

I bought the 6AL second hand without the diode but I have a new 6 AL here and I read the instructions D'oh and it mentions the diode, I am off to the shops now to buy one.
You people have made me so happy. An international bunch of replies within 30 minutes and I can now fix my car. You people ROCK! and so does this website. Thanks so much for picking up my spirits!!!!
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Old 07-17-2004, 02:02 AM
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it finally stops

a 20 cent diode fixed the problem. I have an MSD Retard box also should I have a diode on that power line as well or just to the 6AL?
At least it stops now, my project is coming along!!
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Old 07-17-2004, 07:24 PM
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If after checking the MSD issue it still runs on lets you check your fuel pressure and be sure it is not too high...I had a similar problem (also MSD equipped ) but it was my electrical carter pump that was pressurizing too high a pressure,7psi I think, and my carburator (edelbrock) couldn't handle anything over 6 psi,,,so I've installed a fuel regulator setted it at around 4#5 PSI and no more dieselling problem after.
Ronald.
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