can anbody help me i have a problem with my 2000 2.5D here seems to be no boost from turbo I have had it to 2 volvo dealers whom have told my it was a sticking waste gate so I have had the turbo completely overhauled it made no difference, I have taken it to a independent diesel garage the say there were 2 faults showing 1. diesel temp sensor faulty (where is this) and the 2. turbo boost solinoid faulty(where is this) , as anybody any ideas as im reluctant to keep spending money buying parts