When ever the engine has been turned on it has problems, it sounds like it mis-fire and it "jumps" when traying to accelerate just a little (high "ve").

It does not matter if the car is warm or cold, or if it has been turned off for 1 minute or 1 hour, but the problem seems to fade away the last 10 sek. before the Lambda-reading appears om the display/MT?

** Primarily look at the ego-correction (which is direct information! egoC:-20 means -8% because 0.4% units), not the lambda. Only look at the lambda if you want to verify ego-correction (direction of change). Mounting NBO2 sounds like a waste of time

* "pre-heat" the WBo2 with mde02 command so you can get readings right when the engine start

*Make the EGO range very narrow, like

*-ego_rich_limit=1%

*-ego_lean_limit=5%

* read TuningSession/VEtuning for more on the subject.

** My EGO is not activeted before CLT > 70c and it is there no matter what CLT-temperature.

Is there some start-up enrichment that last so long (until lambda-reading appears or just before)?

* the afterstart enrichment decays to 0% from original (say +25%) in a configured number of cam-cycles (usually 255). While this is theoretically independent from the WBO2 warmup, it happens in the same appr. 25..30sec timeframe.

Next step is to start documenting your setup.

* don't forget about injectors (type, flowrate)

* flyback setup

* firmware and config

* organize thematically (not chronologically), index on MembersPage/HansK

This will make it possible for other to help you investigate the problem.