Brushless Motor on go slow!

[dibble34]

Was using the B4 at the weekend in wet/muddy conditions, it was fine until i stopped and then the car would not move and the motor struggled to turn. My Xcelorin speedo was also flashing all the lights, indicating a problem with the sensor cable. I left it in the airing cupboard for a few days and just tried it. Now the ESC seems fine and the green light comes on when i accelerate, but on full throttle the car only just moves. I have tried a new sensor lead, recalibrating the esc and 2 different radio types, all with the same result. The motor is still pretty muddy and my next step is to strip it down and give it a clean. Just wondered if anyone else has seen this before and could offer any advice.

Cheers

Dave