Hello can someone give me some ideas of what can be wrong, im running external wastegate with 11psi spring the problem im having is it will only boost 9psi an not opening the screamer pipe an no matter what i do i cant get it to boost more with wastegate fitted. I have taken wastegate off pressure tested it an all seems to work fine but i blanked it of on car last night to see if it would boost more which it did 13psi so lifted off so to me it would point at wastegate. I did use this wastegate when i had it set up at 24psi when i put 2 springs in so i used to make more any ideas cheers