I need help, I'm building a layout with 3 Bachmann 64301 HO Santa Fe diesel loco W/DCC and using the Bachmann EZ Command plus. All was running well when I first got them and then put them away. Today I was testing the track I laid out and the dcc loco's just sat there and went thump thump thump, but ran fine on a regular dc controller. But I tested a Kato dcc train w/the command plus and all was fine. Any thoughts?
You located the problem by saying that the other brand stuff worked fine. The problem appears to be in the Bachmann locomotives. It could just be dirty wheels and track because you didn't say how long that equipment sat there without running.
Clean the wheels and the track and see what happens. There are multitudes of YouTube videos on how to do this. Clean all that and report back.
If that doesn't work, you may need to get into the control values of the DCC decoder in the engines. Unfortunately., being the beginner system that it is., EZ command, doesn't have the capability to work with the CVs. You'll have to take the engines to another layout with a more advanced DCC system or to a Model Railroad oriented hobby shop.