okay im started to get a bit confussed as i have fixed one problem and know another one has croped up

i was having problems with the dpf and had it all cleaned out today at a garage and know thats all sorted i know have a new problem that is coming up

the turbo is know over boasting and can find out why

i basicaly had a dtuk box on the car and unpluged it when the dpf started playing up

but know the car is coming up with the turbo overboosting on the tech 2 and when its at low revs its juddery as if it wants to go

has anyone else had this problem or know what it can be

mines the 1.9cdti 120bhp