It's been a couple of months since I've run my trains. Fired then up today and Im having a problem with one engine in particular (Railking ES4400 with PS-3).
I had a stall when switching directions and attempting to reverse. I just assumed the track was dirty, so I cleaned it all up, cleaned the pickup rollers and driving wheels of the engine, and started it up again. No problems at all after initial start up and traveling forward, but bringing the engine's speed to zero, switching directions on the DCS remote and then attempting to reverse causes an audible sparking noise as well as visible tiny sparks where the drive wheels contact the track.
This only occurs for the first couple of inches of movement, and usually the engine powers through it and continues operating, but sometimes the delay is enough to shut down the engine entirely. If I transition back to forward movement after having been in reverse, the shorting issue occurs again, and also only for the first few inches.
This sounds to me like a pinched wire or some other kind of internal contact problem in the engine, but a visual inspection with the shell off reveals nothing obvious.
Does anyone have any idea what might be the culprit of my issue? I can provide more info if needed.
Thanks in advance!