The esc was dead. I found out koowheel used the standard hobbywing esc. Koowheel wanted 160€ for a replacement. Ownboard sells a hobbywing esc for only 50 bucks (including remote) !
I obviously went for the ownboard esc.
While the esc is identical, the wiring is different, I can’t get it to work, both motors make this horrible noise when I accelerate more than just a little. According to my friend the motors worked fine before the esc gave down. I’m thus thinking there’s a wiring issue.
Here a video of the best possible wiring combination I found
youtu.be/uIoUmGABAHE
Here is everything I tried:
Followed this famous guide, tried every possible combination
Take out the hall sensor from the esc and try it again. The hall sensor wiring could be different which is why its stuttering. Might have to run it unsensored.