[aceinspp]

Steve welcome to the forum. My guess is the power supply is not big enough to operate the train as USAT locos draw a lot of current when running the lights smoke and such. Are you sure of the curve size? To sharp and they can bind the loco also. Later RJD

 

[aceinspp]

If your going to up grade the power supply then up grade the wiring also. I still would double check the cure of the track. Later RJD