Today my wife said, "you need a hobby!" So I spent the day in the basement playing with my trains. I re-entered most of my "lash-ups" so I could use the new FSV soft key. I then decided to run my 30-1167 6-8-6 and it wouldn't start up, the passenger cars lit up but nothing from the eng. I did a "read" on that track, with everything else shut down and got "no eng. found." The engine is in the remote, so I put it on another track and it started right up, everything functioned flalessly, put it back on track 4 and nothing again. Next I put another PS2 engine on track 4 and it did not start up. I traced the wires from the TIU to the track and checked the connections on the track, all looked good. I then deleted the PR 6-8-6 and tried to add it back, could not do it on track 4, put it on another track and it added with no issue. Finally I decided to check the track signal and no signal registered. I next connected that track to another fixed port on my other TIU, same result, no track signal registered.
I then put a TMCC eng. on the track and it started right up, in conventional, no TMCC to that track, and it ran fine.
I hope this is something simple that I've over looked