Poco Loco

If that's the case then try it on a part of your layout where you can go more than 3 feet without crossing a switch. Does it work? If yes then try putting the battery in it and crossing the switch again. Sounds like you have one that doesn't like long switches.

David

Apparently the momentum button on the Legacy remote is triggering the problem. I can now get the loco to function as long as I do not use momentum control. Weird.

Scrappy

Yea after a year and a half of owning a 990 set I'm still learning. So far no issues with momentum but have had several others. I usually only use low and high on the momentum . I've never really found a need for the medium setting but I'm thinking since the others don't do it you've still got a glitch in the engine somewhere and yes it is weird.

David

Eliot,

Have you tried a different Legacy engine to see if problems develop in the same spots?  Can you try running your engine on someone else's layout?  If it runs fine somewhere else, that would make me think the problem is either with your Legacy system or with that part of your layout.  If I lived closer, I'd bring my system over and help you troubleshoot.

Have you tried adding a "ground plane", to those problem areas Eliot? Its been discussed many times before that "ground plane issues" often only occur with certain locos, not all. Its possible to have just one loco in your fleet that is having signal issues and requires a ground plane. I imagine your familiar with this,there are numerous postings if you do a ground plane search. A "crude"test of the signal issue would be to hold your hand just over the boiler in the problem area(s) if thats possible. If the loco responds normally with your hand over it, its likely a ground plane issue.

You should be able to cure that intermittent power on the long switch with one of those 6924 relays you have.