I upgraded my premier dreyfus a few months ago from a PS2 5V board to a PS2 3V board. At the time, I was pretty proud of the upgrade because it was a very tight fit and located in boiler instead of the tender.
On my layout, I have some steep inclines (4-5%) that I back trains down to park in a siding. Initially, I thought the engine was as good as new when I completed it, but when I back it down the incline, the engine seems to thrash between speeding up and slowing down when trying to maintain a constant speed down the grade. It does not do this going up the grade or when on level track, it works perfectly maintaining a constant speed. Any one else encounter a similar problem?
I do not remember having this issue prior to the board replacement, and I think I would have noticed it. I have tried other Premier PS2 upgraded steamers (such as the blue comet and greenbrier) and none seem to show the same issue I am observing here.
When manually moving the fly wheel, the drive train moves smoothly both ways. I tried loading different sound sets into the engine, no fix I also replaced the main PS2 board, no fix. Not sure where to go from here, any ideas would be appreciated.
Thanks,
Mike
