My car recently seems to have lost power, when i drive i have low down power however when i pass 2.5k-3k the car feels really sluggish and i can hear a whooshing noise. I have checked with vcds and there are no errors, turbo actuator is moving, i had a injector code which i replaced the injector and code was gone but same problem. At the moment i have a glow plug code however i dont think that it related to my problem. Thanks