Might not hurt to check CV29, could be the OP has at some point entered a value that activated the speed tables without meaning to.
Welcome Rhyfel, to the forums.
You could go start your own thread about your locomotive, and what you want to do. It will get much more attention that way.
In this Electronics and DCC section.
Mike.
This has nothing to do with the OP’s problem and posts can no longer be “moved” for reasons beyond the scope of this thread.
NCE has a chart but it doesn’t list the doodlebug. They also have a chart decoder specifications
Stall means stall current in amps. If the decoder can’t support the amps, it burns out. If you don’t understand how to measure it, start a new thread and someone will be happy to help. You are not limited to NCE just because you have a Powercab. As far as I know, NCE are not sound decoders.
Wow Sound TCS has a decoder chart for their brand and pictures of installation that you might find useful.