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Originally Posted by KalapanaBlack
BEFORE you replace entire coils, does this happen worse when it's wet/damp outside?
Ford Duratec COP systems are NOTORIOUS for cracked coil boots allowing the coil voltage to jump to the cylinder head, creating bad misfire conditions. Make sure when you're swapping coils (the boots might even come apart when trying to remove them) that much attention is paid to the coil boot condition. It might need 0 coils and 3-6 new boots to run well.