Ok, now I am having a problem with the locomotive after installing a digitrax dh123 decoder. It ran fine without the decoder, and when I first put the decoder in it ran well, however after turning it off and letting it sit overnight it starting acting up. The loco will not operate at low speeds, and is very glitchy at higher speeds at times the loco will not start unless I tap on it. I took the decoder out and it ran fine again. So I tried to reinstall the decoder, and the same thing happened. It ran fine at first, then it sat over night, and did the same thing. The motor has the caps and a couple resistors soldered in line with the original wiring. I spliced my wires in line so I would not have to disassemble the loco entirely. The instruction for the decoder do not mention anything about caps on the motor. Should I remove them?