I have three PS2 diesels all made and bought around 2008. When all were brand new, they ran flawlessly with DCS and a Z4000. After two years two of the engines started developing stalling issues. My layout sat for two years at my parents house after I got married. Now I have a layout up and running at my house and now all three have stalling issues.
I cleaned the track and loco wheels with denatured alcohol - didn't help. I ran a DCS signal test with each engine around the layout - mostly 10 out of 10, lowest was an 8. The engines run great with the sound off - they'll change directions and crawl at 2-4 MPH around the whole layout without stalling or shuttering. Could this be a battery issue?