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I'm backed up to the wall on this one. I developed a miss at idle and a slight back fire into air cleaner when I open the throttle. Also seems to have lost speed 40MPH to 30MPH. It seems to be #2 and #3 that seem to not change the miss when I pull the plug wires when running. I have disassembled and cleaned #3 carb 3 times. I have checked compression 125PSI on all cylinders. Have spark at all but looks weak with spark tester,Also replaced plugs. Also even swapped coils no change. Today I totality disassembled all 4 carbs soaked in Gunk can,blown air through all passages and jets and reassembled. seems to run a little better but not right. Please any suggestions?????????????
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