I've used that list for my Roadster IcePack, but it doesn't list the GDI, so I take from that that the generic is the relevant range.

Sewin you nailed it. BHM have never encountered this problem and so in the future, will look at the MAF sooner. I certainly will, and if this now happens to any other GDI, they have a head start, because it might just be that changing the MAF resolves it immediately.

Hindsight eh? If only I'd known.

DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4