Dad50

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Question Asked: Why is #4 cyl misfiring after new plugs,coil. if I unplug 4 coil nothing happens
August 18, 2014, 08:03 AM
It just started running rough. #4 plug was real black and gummy when I replaced it. Every so often there is blow by smoke when he starts the car. if I unplug any of the coils the engine nearly shuts off, but if I unplug #4 nothing happens. Is it the fuel injector?
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