#4 cylinder misfiring. Spark good. Compression 53 psi - The Ford Barn

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#4 cylinder misfiring. Spark good. Compression 53 psi

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11-29-2016, 12:01 PM	#1
Lizzie01 Junior Member Join Date: Nov 2016 Location: Poughkeepsie, NY Posts: 4	#4 cylinder misfiring. Spark good. Compression 53 psi Can't determine cause of misfire and loss of power in #4 cylinder. Idles ok, but misses when revved. Plug coated with carbon. Swapped plugs, same result after 70 miles. Pulled head and #4 black crusted. Valves "look" ok. What could be my problem? Would appreciate some guidance while I have the head off. Thanks!

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