The spark plugs and their shafts are absolutely dry but I will unscrew the spark plugs tomorrow to see.
I replaced the TB, I know the spare one works fine, no difference. I drove in limp home mode by disconnecting the air mass meter, it could be guilty as well. (VCT doesn't work with limp home either). But no difference. The dropouts have a different character but they are clearly there, now more at full throttle.
After that I resetted the ECU, disconnected it from the battery and re-trained it. Now even power loss from 4000 rpm on in some situations.
It is not easy to isolate the error but the next try is the accelerator pedal. I think it is a bad candidate...or at least the plug or wire. If it's not the sinner, there might still be a cable break or ECU.
