Do you have the sensor wire connected properly? It's possible that the wire may be bad, try swapping out a fresh sensor wire. Also verify everything is zero'd out on the transmitter throttle settings and ESC.


If you are using expo then disable it, because expo is doing just as you describe. If all else fails, take it to the track and have an experienced driver examine the car.... verify A-B-C wires are soldered in proper slots, etc...