I have one. Radio gear is'nt the best for mine either. Steering seem's delayed some times.
But, make sure the transmitter batterys are fresh, and the car ant is all the way through the tube. Not much else you can do besides taking it apart and making sure the motor noise filter cap's are still connected, and there might be a grounding wire going to the case of the motor to, to help keep the electrical noise down from the motor.
