the dude fixed it in 15 seconds. f'ing very good guy.
#1, the turbo we changed was boosting (or trying to at least) at 22psi,
#2, the afm was dodge so i replaced with the another standard one,
#3, the loom that sat in the afm was pretty shockingly crusty, so we changed that and he crimped it into place,
#4, the bov i had on the car was pushing a lot of what was in the pipes out, so the sensors got crappy readings and made it try and cut out,
just little bits and pieces. the dude did a massively good job, anybody in melb who wants serious work done to their car should go there.
i hope some of these steps help u in ur problem cuz.
good luck.