03 plate 150 golf tdi, juddering , loss of power

[princeofginger]

car judders at low revs and when trying to put your foot down . it does this in every gear i think. i changed the air mass metre it didnt help, ive put it on my mates computer[not vag] it came up with something like exsessive turbo pressure, intermitent, :. new to this so any help would be great many thanks steve.