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Old 06-18-2019, 10:46 AM   #6
john charlton
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Join Date: May 2010
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Default Re: Mystery Missfire

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On idle I short out the plug connecter to the head by using a large insulated screwdriver. When I short out 1,2 and 3 the engine slows and is idling on two cylinders it is very evident .When I short no 4 absolutely no change . As an experiment I disconnected the plugs except no 4 and tried to start to see if it would fire with any combination of timing/throttle settings but not even a cough dead as a Dodo I remain mystified .

John still in the same place and weather ,maybe if I changed the motor this might cure it !!!
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