So my turbo spools fine starts spoolin at 3 grand but once i reach high rpm such *** 4700 and after it feels like my turbo starts cutting out has this ever happened to anybody b4 or is it just me any help is apreciated thanks ...

 

Need more info....Sputtering? Feels like your hitting a wall? Have you checked for boost leaks? etc etc

 

Do you have a boost gauge?

 

no i dont have a boost gauge but i do have a boos controller supposivley spiking 21 psi

 

did you disconnect your boost lines from your wastegate... or from your BC recently... if you have, you may have simply just put them on backwards... this will stop your wastegate from opening and you will keep boosting until you hit fuel cut..