@Aegis21 posted:Only one outside rail is connected to common.
That would be top of the list things to fix.
I know you may not understand, but that perfectly explains most of these issues.
#1 many MTH engines that have 2/3 rail capability may not pick up on all wheels/axle sets, so being a one side outer rail connected track, that can wreak havoc with track signal and power problems.
#2 Same problem contributes to any engine losing power- example the Lionel.