misfire cyl#4 p0304 | Ford Explorer - Ford Ranger Forums - Serious Explorations

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misfire cyl#4 p0304


New Member
November 18, 2006
Reaction score
City, State
Hamburg, NJ
Year, Model & Trim Level
02 sport
i have an 02 explorer sport and seem to have a problem that has stumped everyone i know. when my truck was pulled into a shop for some plugs and wires (still had orignial's at 62000 miles) it was running ok..a little sluggish. Drivers side plugs were replaced and wires too, started it up to make sure the firing order was correct, which it was but now i've got a misfire on cylinder #4. ran the scanner on it, came up with code p0304. i thought maybe it was a bad coil, so i replaced that. So new plugs, new wires, and new coil...still misfiring!!! :mad: