Reply to "Troubleshooting Post War and 1999 ZW Whistle/Bell function on Post War Tenders"

I have done the same thing with my Lionel 2046W tenders reconditioned. I run ZW transformers and the late Model R. I even have one with whistle diodes. If the train is stopped the whistle works fine. On the run it hardly  works  and even activates the e-unit instead sometimes.  If I increase the voltage I get a better response but nothing like when the train is stopped. Track is clean.  Disappointed. Looking for answers too.