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I had the exact same issue, I swapped plugs around, and the misfire always followed the coilpack. Replaced a coilpack for 45 bux from the dealer and the problem was solved. Haven't had an issue since, new or old maps.
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Current: 2018 MSport x1 & 2009 Cayman S
Former:
2013 BMW 335i XDrive M Sport 6spd
Cobb Tuned '09 135i
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