I would imagine that a smoke unit in parallel with a decoder would confuse it some and give the symptoms you describe. The smoke unit should be hooked into a function on the decoder. One can link two or three functions together to get the necessary power but the M1 instructions will give a figure for the total power output. Blue wire is common positive and yellow and white are for lights and are directional. This leaves green and possibly purple. You will then need to switch on all the outputs using the function mapping CV's.
Older smoke units might well require more power than the M1's outputs can stand. This will require another accessory decoder that can.
The power ratings you are stating in your post are related to the motor power. The function outputs give a lot less.
Older smoke units might well require more power than the M1's outputs can stand. This will require another accessory decoder that can.
The power ratings you are stating in your post are related to the motor power. The function outputs give a lot less.