Hi folks AMK lump, brand new red top TFSI coils, brand new NGK 7's gapped to 0.7 misfire intermittent when hard load shifting up from 2nd to 3rd and 3rd to 4th ease off throttle and foot down again its fine Tried another set of TFSI coils - same problem Tried my old S£ coils (they were working fine) and the problem still here tried old NGK platinum plugs (also were working fine) and the same problem happening, treid these plugs with all the coilpacks listed above unplugged MAF, issue still their The maf is a year old, genuine Bosch, anyone think this could be the issue ?? Engine has just had a boost leak test and i found 3 big ones, the missfire has happened since iv fixed these leaks AMK engine with MTM turbo kit - RS2 Turbo Injecors were cleaned ultrasonically 1000 miles ago. car only run on high octane fuel MAF is my next purchase???