The problem engine is a Lionel's Centtenial GP9 issued in 1997 w/TMCC.
I bought the engine new and have had it for 12 years. Never had a problem.
After sitting for two months, I attempted to run it yesterday.
At maximum throttle, it runs very slow. Going conventional, it runs fast like normal.
With TMCC all features (horn, couplers, lights, sound) work ok.
Both HH performed the same....low speed.
The RESET procedure had no impact on the problem.
Any suggestions welcome.
Tinplateguy
Original Post