intermittent turbo boost and limp mode on V7 D5

Hi I have an intermittent boost problem on my V70 D5 some times there when you start the car but if you switch off engine and restart you get full power. It also goes into limp mode and has no boost pressure if you are on a slope or if you corner hard around a roundabout. has anyone experienced this before and any suggestions would be very welcome on how to rectify this problem

Hello and welcome to VPCUK!
Have you introduced yourself???

Have you got any codes? That will be the first place to start. It's obviously an electrical fault caused by possible vacuum leak or boost leak. Could be 100 and 1 different things, so get the codes pulled otherwise your never get to the bottom of it.

Welcome

Boost solinoid.