Help with interference problem required!

[rcmodelweek]

Hi,
I have recently taken up 1/10th off road after over ten years racing 1/8th Rallycross, and im having trouble with interference glitching on my B44.1.
I use Futaba 3VCS transmitter with R203HF receivers, which do not cause any problems in any of my other cars, a Savox sc-1251mg servo, LRP sxx TC spec version 2 speedo, LRPX12 motor and LRP 500 50c cells. As I said I have never had any problems with the radio or receivers in any of my 1/8th cars, and the problem only occurs with the tenth, even with the car only 6-8 meters away it starts glitching. I have tried moving the receiver, the speedo, disconnecting the servo and walking across the field with the car, walking away with the car having the speedo and receiver in the palm of my hands so not in contact with any carbon, I even mounted the receiver on the wing just to try and prove a point but still the glitching occurs! Any suggestions would be much appreciated!
Many thanks,
Barry.