Well the first thing you should do is to check to make sure all your connections are ok. Disconnect the battery to reset the ECU. Look for tears, cuts, or pinholes on all your vacuum lines. Disconnect the turbo inlet at inlet of turbo compressor and check the fins of turbo and also check for play.
If everything appears to be ok, you just might only need a tune. Get rid of the MBC and get a 3port BCS, a DP and a tune. It will be the best thing you can do to prevent your engine from taking a dump.
rollin on 17's now and they're dirty