Is it possible to exchange both knock sensors on the engine ? Maybe the error switches than.
Wiring and shield are OK !

The KFZW ist mostly stock. The KFZW is only changed in the last three rows becaus the load axis is 140 as maximum.


With the prior tune with "only" 1bar boost i have got it running without knock.
But in this case i also had to lower the ignition angle down to negative angle at high load.
Probably i didn`t recogniced this problem because i was a big noob at this point