what are the numbers on the maf? it is possible you are using the wrong maf. I know a motorset i picked up from z fever ended up with a gti-r maf, did exactly what your saying. only way to tell the difference in the two mafs are by the numbers they look exactly the same. Martin is the one who actual solved my issue, had to drive back to them an swap them out. lmk the numbers and ill make sure its the right maf.