Whats up guys im having problems with my rex and i done know what it could be. My setup is a gsr turbo ay 6 psi, injectors, fuel pump, fuel pressure regulato everything was workin good until one day it was reving up by itself and it wont stop doing it and i can hear an air leak but dont know where it comes from. Oh and the car is not reving all the way up it struggles líke ay 7000 rpm like if its needs more gas

 

Find your vacuum leak, fix it. Then go get that thing tuned at turn the boost up.

 

get some carb cleaner and spary it around the manifold and the vacum hoses while the car is running, when the engine revs you got your vacum leak. fix, replace, tune, turn up boost

 

Good advice but use something that isnt a liquid that can pool up and stay on your hot engine parts. Propane or butane torches are your best bet.