hi i have a 2003 golf gt tdi 150 with severe power loss and also wont rev for the first 5-10 seconds when started from cold but when you press the throttle you can hear the timing changing because of the diesel knock.no missfires what so ever or fault codes and also no power but you can hear the turbo boosting and also you can hear the wastgate releasing the boost,usuall things have been changed as precaution,MAF sensor and fuel pumps and camshaft has been inspected,are there any known problems with ECU's on these cars as it is suppose to be 150 bhp and feels like 40-50 bhp and it's not funny.