Thanks for the info. I have an LRP Vector 8, 2500KV. I removed the motor from my car and cleaned off all of the solder. I re-soldered the wires and they are placed in their correct position and order. I also changed the sensor wire and I still have the same problem. I can tell something is moving in the motor but the post that the gear is attached to doesn't move. It just sort of vibrates when I give it some throttle. I can turn it by hand. My motor worked before I changed my ESC.