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Hi im kevin it unlikely to damage the coils most likely a bad plug have you taken plugs back out and checked them ?not unusual to get the odd plug that so eone has dropped
Ok and can you narrow down which cylinder has missfire ?is it missing on idle ?
Ok im gonna opt out dont have hugh coverage of your model another tech will assist shortly
any codes? is the engine light on or flashing?
have you scanned it to see if it has any other codes?
does it run well enough to drive to a auto parts store? did you gap the plugs?
I would drive it to a parts store and have it scanned... hopefully it will have a miss fire code so we can pinpoint the effected cylinder