What is your engine doing?
I assume the driven wheels must be slipping / skipping.
If so, have you tried:
replace the traction tire with a clean, fresh one.
add weight to the locomotive.
The Power shell on a 2041 normally has a weight riveted to the back of the shell, using the porthole in the door for the rivet. (The dummies do not have this weight, nor do the shells that were sold by MPC).
I don't recall whether the 2024 locos had the weights.