03 V40 1.9D 115bhp power loss

[V40DSchariot]

Well, I took car to another garage this morning. An authorised Volvo garage, but not a dealer. Originally I was booked in for an hour for diagnostics. When I got back, they had spent an hour on it, no faults, but they had found a problem with the turbo vacuum circuit. They could'nt spend anymore time on it but mechanic pointed out the area's to look, at a reasonable price aswell.
He had a gadget to pressurise and create a vacuum and got her running, reving all way round.
When I got home I started looking through pipes again and had a test pipe to systematicaly swap until I found the problem area. It turned out to be the valve underneath the cylindrical valve bolted to manifold. I'll try a photo.
Hmm, uploaded photo but don't know if it's attached to this thread. Anyway, car's pulling like a train, switched off several times and upto yet been good.
I took the pipe off that goes to the little valve and sealed the end until I get a new valve.
Huge thanks to Baffler for all the pointers.