I finally got the car sorted for the lack of power. The car was found to be running 50 BHP less at the last rolling road GTG: http://www.mbclub.co.uk/forums/showthread.php?t=2878
The boost was there as they measured it at the intake and also there was no leaks in any of the charge pipes because if I closed the dump valve I could hear turbo flutter/backspin.
It turned out that the fuel filter was leaking around a closing seal causing loss of fuel pressure. Thanks to George Fraser for finding the fault/replacing this for me at very short notice.
The beast is back! feels like a new car!
The boost was there as they measured it at the intake and also there was no leaks in any of the charge pipes because if I closed the dump valve I could hear turbo flutter/backspin.
It turned out that the fuel filter was leaking around a closing seal causing loss of fuel pressure. Thanks to George Fraser for finding the fault/replacing this for me at very short notice.
The beast is back! feels like a new car!