I've got a 57 1.8tfsi and I have, what appears to be, a slight misfire at idle. The PCV has been replaced along with the rear crank seal, and oil pick-up pipe which seemed to improve the idle but the shudder has come back. Car does drive fine with only a slight hesitation from partial throttle through to 2/3rds thottle. I've used MAF cleaning but that hasn't made it worse or better. There was an old stored code for cylinder 3 misfire so swapped over cylinder 1 and 3 coils, erased fault and hasnt come back but there is still something amiss with the car. Any help would be appricated, thanks!