Originally Posted by
kufman
Sounds like a bad sensor or the sensor cable is bad. check to make sure all the pins are pushed in on both ends of the sensor cable. I had a cable break on me the other day. Wire broke right where it is crimped into the pin.
Had that problem Check your sensor wire first. then try another motor to see if it is the ESC. I had this same issue and it was the ESC not the motor..... But sometimes it can be a bad sensor wire.