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Unexplained Cylinder 4 Misfire

dtreid

By dtreid
in Engines & Drivetrain

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Tannerg2004 New Member

Tannerg2004

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Posted

Hello all I got a 4.3 Gdi motor throwing a number 4 misfire. I changed the spark plugs still nothing so maybe a coil or wire right? Moved them around and the misfire didn’t move. Ok those aren’t the problem maybe an injector? Replaced the injector and all the seals to go with it. Still misfire cyl 4 I’m lost at this point. Code P0300 and another for rough idle. Any help is appreciated 

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