I have a digitrax DH465 decoder installed in an American Flyer locomotive. When I first installed it the locomotive ran perfectly. After a few minutes, it started having a delayed response to commands. Now after a few hours of running, it will not reverse, runs jerky, and does not respond to commands. I'm convinced it is not the track as another locomotive with the exact same type of decoder in it runs over the same section just fine. I swapped the pickup wheels with those of another locomotive and looked for loose connections with no luck. Is there a CV that could be causing this problem?
The decoder in the problem locomotive was a replacement from digitrax for a defective decoder, which itself was a replacement for another defective decoder. I marked each decoder I sent back so I'm fairly sure they were replaced and not repaired.