I have a week old Model Power pacific, U.P. #2295 with the vanderbuilt tender. I use a Digitrax Zephyr DCC system and a DZ-143 decoder in the tender (perfect fit).
Problem is - the thing runs like the track is filthy! When it does run, it's a great runner. That's for the few seconds until it jerks to a stop then starts up again.
I've cleaned all my track with erasers, files, sandpaper then vacummed the track and wiped it off with a T-shirt. I've inverted the loco on a pad and ran it at 3/4 speed with a very fine abrasive dremel disk rubbing on the flange sides, the wheel treads and even the back side of the drivers, where the phosper bronze wipers make contact. I took the tender wheels off and keyed the insulated side of each axle into my drill chuck and spun it then rubbed it and the axle with the same items I clean the track with.
I even sanded the tender axle wipers/contact plates/screws to make sure they are clean. This loco is spotless! When upside down, I tested each driver and tender pick up wheel for contact - all work. When on the track, I can pick up the tender and the loco will run only on the drivers. I can also pick up the loco, leaving the tender on the track and it works.
I've tried many settings on the DZ-143 - no help.
The running pattern is consistent - at first it runs like crap, then it starts to behave OK, then after 5 minutes it starts stalling again. Thinking the decoder might be over heating, I checked it several times - about bath water warm at most.
I even installed several dozen power feeds on my 3x8 layout, which helped a bit but not enough.
Help!
Ken