Bump for the question above.

 

Well if you are only getting 10-11 psi I would say it is because you are missing onw of the pills in the stock vacum lines. I took out my MBC and reconected the stock solenoid without the pills and I only got 10-11psi.

There is one by the boost solenoid and then there is another pill in one of the lines past the T in the line. Check to make sure they are BOTH there. Report back if you have both or not.

 

Read my answer again. The short hose from the T to compressor hosing/discharge tube had a restrictor in it. You are now getting too much boost pressure to the wastegate and it is opening. You either need an MBC or to restore the hose that was removed. The other option is to get the restrictor out of the hose and put it in the new hose.

 

Sounds good, thanks for everyones help. But what do you think about the greddy kit, is it designed for the use with a MBC or what?

 

I would think so. Most people get the MBC before a new FMIC.