My suggestion is to scan for the code. It's probably the turbo-overboost code, but it would be nice to know what it says.
Until you can get to that, check you waste gate rod, waste gate solenoid wiring connection, the vac source tubing from the coldside to the vac solenoid, the vac solenoid wiring connection, and the vac tubing going from the vac solenoid to the BPV, and condition of the BPV.
This is the waste-gate rod (this is a mitsu turbo, so it looks slightly different, but you get the idea):
This is what the waste-gate flap looks like, but you won't need to look at that:
This is your waste-gate actuator, source-tubing, and actuator tubing: