before you do anything check this first...unscrew the turbo boost pressure sensor on the turbo inlet pipe held by two star head screws and lift up and of and look for oily sooty deposites on the cone theres a small pin inside can get blocked..if i looks dirty in any why blast it with wd40 and shake the bejezzuz out of it to get rid of any access fluid, put it back in and drive your car, if the cars ok then thats your problem, you wont get to far because you will lose power again...the part from a dealer is