Vintage electrics

[AndyF]

Hi

I have been trying to get my old procat running. When I plug the battery in the car starts twitching. When running, I can either drive forward or turn, but not both at the same time. If I steer whilst the throttle is open it carries on in a straight line. If I release the throttle it steers, re-apply the throttle and the front wheel remain at the same angle.

It has an old 17T single motor, speedmaster esc and a futaba receiver all around 18 years old!!!

The question is; Is it my receiver, transmitter or esc thats at fault? Any ideas?

Andy