can't seem to keep our g-scale 4-6-0 running right, we can clean wheels and clean track, will run fine, ten minutes later if you try to run it it will jerk and stutter, can run our other locos on same track with no problems.  any thoughts!? it ia bachman tweetsie 4-6-0 g-scale

my father and i have started a g-scale layout here in montana and want to make it a nothern pacific layout but we can't seem to find any decals for this rail line, would also use bn or bnsf as a alternative if we can find any, can any body out there help!?