Hello can anybody help me I was driving along today went to accelerate and the turbo sounded different like a hissing noise and won't boost also it tries to cut out when coming to a stop with clutch in not smoking yet but drives like rubbish any ideas how to find out without spending money no lights on dash nothing 

blew a vac pipe? 

As above, sounds more like a pipe failure somewhere than a blown turbo. Tend to get oil pass through when they go so would be pumping out smoke from the exhaust.

Had a quick look can't see any pipes split or cracked anywhere 

Would that make car cut out when coming to stop 

It could do if you lose enough vac pressure. Must be a mighty leak. Have the car running and listen from under the bonnet. Try to give it a little rev to increase pressure making a leak more obvious.

You have a lot of pipes to check takes a good hour to check them all and he inlet cracks when under pressuec