Turb0Guy

Finally Got the car back together after fire. Left the old injectors in. Was the little rubber plug in the end of the pulsation damper that had melted, causing the fuel leak. Car seems to be running good . However it pops here and there when idleing at 1000rpm. When i rev it up from 1000 -3000 the turbo starts to whistle than at around 3100 the highpitch whistle changes and the engine almost hesitates and gets really loud and the turbo whistle is allot deeper. Would this be secondary injectors firing or my turbo falling apart?

Any help much appreciated ! Thanks