this is my 1st late model FLH, my 1st fuel inj, i´ve had this 05 RK since 2011 w/out a break down, once... until sat 9/17/16. i was ten miles from home. the last of a 900+ mile trip, running hard n fast(200 miles @ 100+mph, one brief smoke break, in less the 1 hr 45 minutes).... all of a sudden the sled sounded like my early model fouling a plug.... couldn´t keep it in 5th gear, popping, spitting, just chugged it home??? can i get a lil´ help figuring this out please