hi guys , my 97 wrx sti import has a whirring/whining turbo on tickover .. admittidly the car has an apexi ecu, forged pistons lightened flywheel upgraded injectors and had been remapped but previous owner re initialized the pfc. im not driving the car atm due to this but am worried that turbo might need a rebuild or replacement .. should i be worried ..any ideas ????
