Attached is a video of my MTH PS1 challenger that I had the software issues with. I removed the seuthe smoke units. Fabricated a 2 to 1 stack adapter for the smoke unit. I used Epoxy putty for the adapter.
I modified a Lionel diesel smoke unit (needed something small) with the new lionel wick and increased air intake.
Just a couple of laps on the test track. I believe this engine was 1994. The purple box had no numbers on it I assume it was an old MT- number.
Enjoy.
Mike