[Lorribot]

Ok, so car came back today running as good as ever.

Mechanic went to basics to test from tank to injectors.
The upshot was the wiring loom to the low pressure pump in the tank had corroded on the main power in lead.
It looks like a previous owner had the issue and they or a garage had taken the rear seat out and the tank to fix the problem and had broken a bunch of wires and and also some of the pipe work and bodged it back to gether to get it working long enough to sell it.
There is a kit from Volvo to replace the wiring, no idea on the part number or cost at this point but aparently they sell quite a few so coulb a common problem.

When i get the bill i'll see if i can get more details on teh kit, but assume any Volvo parts department will know all about it.

Hope this helps someone.

As an aside my mechanic said the fuel tank was teh same as the one on the Ford S-Max. I assume most of the other parts are the same just have Volvo P/Ns rather then Ford P/Ns and no way to translate.