Hi ED30R, it has 2 components, one is the valve which also has vacuum actuator and the throttle body which has a flap that opens and closes, the vacuum actuator on the valve was tested and it held 40 psi vacuum using a manual handheld gauge, would 40 psi represent actual driving conditions in 6th gear at 2200 RPM?
I went back to basics today, removed the exhaust from it's connection with the turbo, cleaned the exhaust thoroughly. Inspected the turbo and movement was easy and there was no play in the shaft on either side of the turbo.
I took of all of the turbo boost pipes for a full inspection for any leaks and found nothing, i changed the seals on the boost pipes as I had noticed an oil leak on both connections where they went into the intercooler. I drove the car and exact same message for limp mode (6th gear around 2200RPM), i inspected the pipes and noticed the oil leaks at the same points.
I took all of the connections and added duck tape around each connection to create a better seal. I took it for a drive, it went into limp mode again HOWEVER, at the time it went into limp mode one of the boost pipe disconnection with loud bang, it was the connection which goes horizontally across the radiator (I'm assuming this was the weakest point).
Any pointers?
TIA