Hi, Three of my AS Deltic's (DCC Sound) have started to suddenly perform very strangely. All three are now running very jerkily, accelerating/decelerating too quickly, sudden increases and decreases of speed, and often running at a speed contrary to the controller input.
My other Deltics (and all other locos) are still running ok so I'm not sure if its track issue or the models themselves malfunctioning. In one case the engine was running fine for a while and then started to jerk violently, before running ok and then again jerking.
Does this sound like a dirty track/wheels problem, a track connectivity issue or something else?