That's because sensorless systems pulse on 2 poles and listens for EMF on the 3rd pole. Depending on motor manufacturer etc. not all ESC's and motors align the same way so sometimes you need to move the connectors along 1 at a time and you'll get much better results. That is how my EZRun 60A's are in all our cars. None of them are wired up A-A B-B C-C. Mine are A-B B-C C-A kind of config.
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