I got a 07 335i single turbo from docrace 6266 gen 2, have the FPS stage 3 bucketless duel wilbros (450s) new shotgun pulley system for hpfp with new pump. Brand new fuel pressure regulator for the other side of the fuel tank. New clips and seals for index 12 injectors, new plugs, new coils, new xclutch, gfb 3 electronic boost controller, so if I turn the controller up past 50 on gain it starts misfire under wot in 3rd and the rest the gears but not in 1st-2nd gear. I’m stuck at a loss after spending way more than I want to. I haven’t talked to the tuner since this problem started. He said to replace one of the items but I decided to just replace it all and it still doing the same thing.