I am having repeated problems creating MU consists using MTH PS-3 NKP F-7s, GP-7s and RS-11s. I have done this for years with PS-2 diesels with no problems including three powered SP Tunnel Motors with my heavy beet train and three powered SR SD units powering a lengthy consist of auto parts 60 ft boxcars on the "Sparkplug." All units run fine (lead, mid-train [Locotrol on SR], and swing helpers) on 2% grades.
I have carefully followed the instructions in the NKP PS-3 F-7 Manual to ensure the settings are right for the trailing F-7. But the problem I'm encountering is the same for all the PS-3 diesels: I set up the "Lash Up" on a controller but when I apply voltage only the "rear" unit tries to move, and in the wrong direction. The "lead unit" is cold, dark and quiet. This has occurred multiple times on my NKP F-7s (A-A) and pairs of NKP GP-7s and RS-11s.
My layout uses three 4000s, three TIUs and four controllers. The layout is in "Command" mode so I can run any train anywhere with any controller. I normally run four at once on a double-track main with another train on the branchline and one working the yard. Because I like long trains on the main lines I prefer all my diesels to be double-headed (at least). But it's not working for any PS-3 diesels.
I've swiped shells on NKP Demonstrator F-7 #801 with a WM F-7A non-powered unit so I still have a protypically correct A-A consist on NKP's CB-2, but I consider that only a temporary solution. (Just put the NKP S-2 back on the train where it belongs says a steam-loving neighbor/model railroader!)
Anyone have any suggestions as to what I'm doing wrong? Thanks. Rick
