problems

I bought a Scaletrains Dash 9 a year ago, and it had been running fine and sounded great until recently. I had taken a hiatus of a month or so, and when I tried running it last weekend, it ran incredibly slowly (13 scale mph) at full power. It keeps stalling, slowing down and speeding up...

Hello, I have Bachmann HO B units, GP38-2s, and an S4. They have been running for about 2 weeks and now they are not working. I oiled the motors but some of them still do not work, just the lights turn on. What can I do? Thank you. Ricky