turbo problem

Hello again, everyone! Just want to pick some brains. I have an '02 1.4tdi 75hp and have been getting issues with the turbo occaisionally going on strike causing a total loss of boost. It seems to happen when the engine hasn't been running long and when I'm pulling uphill. There are no...

Can anyone recommend an A2 specialist in the Reading area please? I have A2 tdi 90 2004. I have a lot of whistling from the turbo when accelerate. Often goes into limp mode and almost all the time eml on. Plugged in and says under boost. Have smoke tested to see if any leaks but nothing. Is it...