Well it seems to be the ECU as you and me would have the same base map...
What sort of voltage do you have when cranking?
IRA11Y : The engine just cranks and cranks, probably for a good 10 seconds or so, and still doesn't fire. 26% should be plenty of extra cold enrichment fuel I would have thought?
Once its started, it runs perfectly and holds a steady 875rpm when warm and 1100rpm when cold. Which really does point to a voltage problem as ta22skyblue pointed out.
At the moment I just plug the stock ECU back in, fire it up first try, get the engine coolant temp up to around 60 deg, then swap the ECUs around again and then the Wolf is happy and starts first try. Not an optimal setup, and a royal pain in the arse