I bought a brand new HO Bachmann (Not spectrum) UP GP40 (I think that what it was?) DCC engine to play around with and I'm finding that it's really jerky at slow speed and slow to start even with no cars. I ran the engine froward for 30 min and in reverse for 30 min to brake in the drive system and it's still really slow to start, relatively noisy and jerky at low speed is there anything I can do to make her run better? I'm using a Prodigy Advance Sq controller and I've tried adjusting the SV and nothing helps!

Thanks
Ed