found out what the issue was, it was configured for "open" mode, switched to "Closed" and it all works as it should, no idea of the difference between these 2 tbh, the manual is terrible and makes no sense.
might not be stock ECU after a bit more playing today as it will boost to 15psi without fuel cut, ah the joys of second hand car buying, no idea of the prievious mods ....
And Jez I eventually will, just working out my options of a custom tune, but thats a discussion for another thread