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1986 240 Starts and Idles ok engine cuts off under acceleration

It could be a bad AMM or the connector to the AMM needs cleaning and re-connection. I've had both of these give the symptoms you describe. Try disconnecting the AMM (engine OFF) then start the engine. If it has the same symptoms, the AMM or its connector are probably the problem.

My daughter's '86 would idle but not accelerate. I pulled off the AMM connector afew times then made sure it was fully seated. The problem went away.






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