went for a long drive, when im pulling away theres a whooshing sound mid revs and above, sounds like a hairdryer kind of noise,obviously not the turbo sound. still drives ok but very noisey and every so ofter there is a loss of power.... doesnt do it at stand still, only pulling away.

has anyone encountered anything like this before?

im meant to be taking it on holiday next week so any help/advice appreciated

thanks