Hi there
I was looking for some advise and help with a problem i have with my car.
I have a Ford Focus 1.8 TDci Ghia 04'Reg.

i was driving yesterday, having put my foot down whilst travelling up a hill the 'turbo thrust' attempted to kick-in and

failed. Since then when i accelorate by putting my foot down fully, i can hear an annoying 'whirling' sound, when the rev's

reach about 2500. Its almost like the turbo is trying to initiate, but failing to do so.

There are no fumes being emitted from the exhaust.

Usually, when I accelalorate there is a 'lag' for about a second and then the car rapidly picks up speed in the form of a

thrust - i assume this is when the turbo kicks-in.

Ive been told its either the 'Air Mass Meter' OR the 'Turbo'.
Is there anyway i can test this or check this?
Im praying its not the turbo :-(, which im guessing will be very very costly.

I hope ive described the problem so it can be understood.
Any help would be much appreciated.

Thanks in advance and i look forward to hearing from any experts.

AP