What would be causing this kind of behavior?
I'm looking at the tach tape around the motor (this was a PS1 to PS2 conversion). It doesn't look like perfect white stripes all the way around - but rather like dark in spots, almost like wet (but it's not wet)...
As I begin to give it voltage in conventional, the motor just sort of twitches back and forth, then a little more voltage and it gets the wheels going fast - too fast. Oddly enough the chuff sound is something like one chuff and puff of smoke per 4 whole wheel rotations. That's not normal, nor even a feature in DCS mode I don't think.
Which part has gone bad? Is it the Tach tape, the tachometer reader? Perhaps a pinched wire could be causing this?
*Ive confirmed the problem is not in the tender / the PS2 board in there controls all my other PS2 steamers without fault. It's the engine portion which behaves the same way plugged into any good tender. The problem is at the engine, but I don't know the issue is/or where.