Started stripping the car, bumper off, intercooler off, pipework etc. to find my boost leak, now it is P*SSING down, typical.
Anyway, was hoping to find something, but cant really say I have, now going further to check the operation of the check valves in the system.
I do have however, a reduced diameter dv valve air connection, maybe 1.5mm, could this cause the dv to be restricted in its operation and therefore pass air back into the intake side of the TIP?
What about turning the dv round so the air connection is horizontal? what effect would this have?