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I HAVE A F150 4.6L WITH MISFIRE CYLINDER #6 I REPLACE BOTH COIL AND SPARK PLUG WITH NEW SPARK PLUG ,COIL STILL RUNING ROUGH AND MISFIRE #6 ALSO CHECK COMPRESSION IS GOOD WITH IN SPEC

Vehicle: 02 FORD F-150 4.6 L

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The fuel injector might be clogged if there are no issues with the wiring. you can try to fuel a good fuel system cleaner like BG 44k or 3M

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