9 votes
After fighting everything out, a friend came over and confirmed that the #7 coil was in fact bad, so thankfully that was the cause of the misfire.
Won\u2019t own another ecoboost ever either, it ate Coils, Plugs, Turbos, Phasers, Timing Chains \u2026\u2026.
Issam's right about the poor reliability of COPs. We regularly have vehicles in the shop whose spark plugs outlast the coils that fire them by tens of thousands of miles. One 5.4L ford V8 got six new coils before a single plug failed at 90k.
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