Like the title stated above,I am trying to figure out why it wont go past 4K...S4 vert w Full S5 TII swap.Tried a different ecu,swapped out the turbo,new plugs.Im thinking something with the fuel delivery....Starts right up no problem,idles smooth,just stops at 4K while driving,the blow off works,but it seems just like theres no boost pressure...PLease Help Out!!!

 

check your fuel line bro... that happend to my s4 na and it caught fire cause the fuel line was clogged and popped... knock on wood man not trying to jinx just trying to help you be carefull

 

That is right around your staging point. Did you test your secondary injectors to make sure they fire?

 

when it doesnt go over 4k, does it sound like a rev limiter??

 

What fuel pump are you using? Make sure you have a clean sock filter installed on your pump.

 

thanks for any and all your input.i will try checking the secondaries and the fuel pump is a walboro..