Right a bit of an update on this matter.Found a great garage that has helpped me out for nothing to help see what up with it and one of them took it for a test drive and said they could hear a whistle noise coming from it and thought it may have a leak somewhere around the turbo told me a maybe worth fitting a cheap gauge to it.Done that and seems in only running at 0.5 bar and is ment to be about 1-1.2 .Need to a new rubber from the turbo to the intercooler now and go from there but after explaining to the garage what i found he said it maybe a couple of problems but need to get this matter sorted first and go from there
Does sound like you have a leak turbo to inlet manifold, just need to find it, really not that hard, get someone to revit full bore while you look in engine bay, it should be easy to spot/hear, Rick