i got a 52 plate tdi and when i accelerate at low speed i get a noise as if the exhaust has a hole in it its the turbo i think and also when i am at say 70 going up a hill it loses power a bit and wont accelerate very well also im getting a juddering and rattle at 70mph onwards now i know this cud be down to balancing ...its mnot drop links or driveshaft as i replaced them Please help its driving me mad