No Nick, not with the pipe disconnected cause than it should be 3.5 Bar shouldn't it?

And yes your saying about the offset also came to mind when I studied the dynosheet.

Like I told you, CO was set at about 4.5% otherwise it wouldn't drive (but set at the required 2.7% CO all seems nice at tickover), fuel pressure like explained above and for the air leak, well could be. But the car hesitates when driving and accellerating. So only when set the CO higer and turning up the fuel pressure from 3 bar to 3.6 bar the car feels better to drive. But I did the rolling road session only with raised CO, not with the higher fuel pressure.