Mechanics

CYLINDER 4 MISFIRE P0304

2003 Ford F-150 • 111,000 miles

2003 F150 XLT 5.4L V8 - recurring cyl 4 misfire after 8 new coils, 8 new spark plugs, 1 new fuel injector on #4, compression test passed - any ideas?
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GRIZZ77
June 14, 2012.



Check to make sure the injector is getting power and working. Check to make sure the wiring to the coil is good and you are getting spark. My guess is that one of those is missing.