locomotive not working properly

[stewart166]

hi everyone yesterday my flying scotsmen with a decoder installed worked fine but when i came to use it today it would move then qquickly stop then when i push it it moves and then quickly stops i know its my train because i tested another train that i have on the track and it worked fine so i do know something is wrong with my locco but i dont know what to do i have checked to see if there were any lose wires in the locco but it was all good i have no clue on what alse to do if someone could help me it would be aprecated thanks hope for replys thanks.

[Rog RJ]

The first thing to do is make sure the track and wheels are clean.

[Augustus Caesar]

Try the traction too by lightly putting a touch of weight on top of the loco with your fingers to see if the wheels are getting full contact to the track. If that works then there may be an imbalance to the wheels or extra weight could be added internally to the loco.

[Fishmanoz]

Same as on the other thread. As I said there, likely to be faulty decoder. 

[poliss]

What controller do you have? If you have the Elite then try resetting the decoder.

[stewart166]

thanks everyone for the help i found out that the pads that go to the wheels which cares the electical curent was very dirty and was not on the wheel so ones i had cleaned it it worked perfect

[walkingthedog]

I reckon that 90% of all running problems whether DCC or DC are caused by dirty wheels/pickups.