Lol use a can of upper engine cleaner and clean your bcs (Boost control solenoid)..
Otherwise I\'d check your wastegate actuator, my wrx was boosting 9psi(ish) even with just the wastegate connected directly to the pressure nipple on the turbo. Pulled it off and it was like a babies toy, just rattled around and then finally broke lol
Get rid of the boost tap as well if you\'ve got one lol