I have a Polar Express Engine in S Gauge by Lionel. When I started to run the engine it runs intermittently. It will go for a few sections of track then stop, shut down, restart and go again. I am using Lionel FastTrak around my Christmas tree.
I can run the engine on my main layout and wit works until you go slow and then it acts ups. I have cleaned the pickup wheels and the track. No success. It is almost like having a broken wire that makes and brakes contact. I have not run this engine much as it is part of my Christmas tradition. I t has less than 50 hours of run time.
Does anyone have a suggestion to correct the problem.
When running, the engine produces all the correct sounds, bell, and whistle.

David