I've recently bought the Bachmann HO scale EZ Track Train Set for my Christmas setting. I bought several additional pieces of track due to the size of the display. I also bought a graduating scale set of brackets allowing for an over/under figure 8 configuration.

Running the locomotive by itself appears to be fine and it scoots around the track as expected. However, as soon as I hook up the tinder box, the locomotive can barely pull it around the track. I also have 5 other cars and the locomotive will not pull all of them.

Have I bought and implemented too much track for the power supply that came with the package? I'm relatively new to this hobby so I may be missing some basic.

I'll say I added 15 or so pieces of track. Do I have a power supply issue? If so, how do I correct the problem?