Joe, I've used these sucessfully in several Bachmann and LGB engines, but not tried USA. I know that USA motors have a reputation for having a high amp draw, so it could be that the decoder is overloading and reseting. You may want to keep the NCE and add a Phoenix P% to provide the sound. Overall I've been very happy with the Loksound XL but I did buy the programmer which makes settiing them up a lot easier. I'm standardiizing on Loksound except for my Aristo locos which have the socket that the QSI unit plugs into.
Good luck figuring this out.
Peter.
Good luck figuring this out.
Peter.