No, its not a misfire. It just doesnt pull away smoothly when the CO setting is at the required 2.7%. When setting it at 8% it feels much stronger at low revs. Imagion just pulling away at a traffic light, not at full throttle, just a normal drive away. Then untill the boost comes in it feels like there is little power, like its getting too little fuel. A recent rolling road session saw indeed a lean mixture through the whole rev range.

So I thought if this base setting isnt correct, all the calculations made by the ECU also are at the wrong values. Doesnt sound too bad does it?