Here is your ford tech....interesting it seems it needs a calibration update ....but that seems silly because you said a tune cant fix it....i was waiting for ford tecmakuloco to pull the drill out lol
He doesnt know exactly what got changed...im telling you its called allowable wheel torque error...ford got over zealous in their misfire detection software ...its probably very good logic but i think the bugs needed worked out...its why people with coyote mustangs have to have a nuetral profile or crank relearn done when you get a new clutch....it all has to do with rate of acceleration that the crank position sensor sees