I have a strange phenomenon with my TD5 at present. And I hope someone can help please. The car pulls incredibly well with lots of torque and smooth power - until about 3000rpms. Thereafter it makes more and more noise and vibration without any more power or "oomph". Like it runs out of breath. To me it feels like its not getting enough diesel but maybe some of you have experienced something similar and can give me some advice. It will be much appreciated. Thank you.