Not sure what the problem is or where to start looking. Hard wired a LM3 in a Scale Trains gevo. It runs great at 20% and under. When you go over 20% it will go 6 to 8 inches and stop (everything,engine, lights and sound) last about a second and does it all over again. It's like turning a light switch off and on. Throttle back under 20% and it runs great. Switched out the LM3 and still does it. No warning signs or problems come up on the controller. I have 2 Scale Trains SD-40's and a Intermountain ES44 that run great. (All have been hard wired) Any ideas?
Thanks, Dave