Thanks so much for the input. I did a decoder reset and it works fine now. I thought that's what I would have to do.
Dale Latham
The first thing you should probably do is reset the decoder to factory defaults by programming a value of 8 into CV 8. Sometimes really weird values are left in decoder CVs as a result of factory testing, and resetting them clears everything out.
Also make sure you have your throttle set to 28/128 speed steps. If it is set to 14 speed steps, that can cause erratic operation with a 28 speed step decoder.
It could be an artifact left over from factory testing, such as an odd speed table, or some other such thing.
I'd suggest doing a reset on the decoder (CV8=8) and see if that helps. If not, send it back for a replacement. Digitrax has a 1-year "No Worries" warranty on all their products.
I installed a Digitrax DH165L0 plug and play decoder into a LifeLike P2K GP-7. I programed the 2 digit locomotive address into the decoder and everything seemed well. Afterward I placed the loco on the track. When I advanced the throttle to speed step 1 the engine began running at a moderate speed. I continued all the way up to speed step 99 and the loco continued running at the same moderate speed. I could not control the speed of the loco with the throttle, but the engine did stop when I returned the throttle to zero. I am using a Digitrax Chief with a Big Boy booster to control the railroad. I have never had this problem before.
Do you think this is a bad decoder or a programing problem?
Thanks in advance,