LOCAL TO NORTHAMPTON! ... please read

[nnvi]

Anyone local to Northampton, Welly, with a b5.5 130 model. I think i may have a *no swearing* MAF.

Car boosts fine until HOT then the turbo shuts off, restarting the engine doesn't do anything, (still revs to red line) still the same. No fault codes on ECU. MAF was tested for flow and seemed ok. Was told even though the flow test seemed ok, it could still be that. Would like to test with another MAF.

I did a diy maf test this morning by un-plugging it, and the same result. just a bit of black smoke. i then tried it, MAF completely out, the problem was worse.

please help if you can