Actually i have a stock 02 WRX and the problem is all about "no pulling power" from the turbo. The readings on the boost gauge displays as it should be i.e. 1.0-1.2 bar but still as if driving a non-turbo car. Also, the sound on the BOV has been really low from the time there was no power still with boost being displayed at its highest. While running, the revs are slow to reach at every gears while exhaust very loud.
Besides, the car runs perfect on normal. Turbo and Boost leaks and all of that has already been verified and they are fine. Clutch, flywheels, timing belt changed around 40000kms and its now around 75000kms. No other modifications has been made while the O2 front sensor and right hand side rocker cover gaskets have recently been replaced and again no other leaks has been noticed.
I really cannot figure out if its a problem of clutch or turbo itself. Please provide any advise. Thank you