Hi again everyone i have finally fixed part of my boost problem. I now have the first lot of boost but when it gets to 4500 rpm my second turbo kicks in but i only get .5 bar and you can here something leaking and it kicks in and out. There are no leaks through the boost pipes what could it be the first turbo holds boost fine its only on second turbo.
Its a fd3s with stock twins.
Thanks again for any help.
I had exactly tha same fault at tha start of tha year, I found tha vacuum hose leading 2 tha second turbo actuator was split ! Bit difficult 2 get 2, u will need 2 get 2 it from tha underside & its wedged between tha subframe & tha bottom of tha engine.
I think i know which one you mean underneath the turbo i had a problem with that one a few years ago thanks i will give it a look this weekend.