Need help with a tsunami mated to an ATH Challenger

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I am at my wits end. This is going to be long so bear with me please. :

I changed my MRC decoder in my challenger to a tsunami. I tested it and all seemed fine. I put it back together and tried it out and it ran FANTASTIC (buy itself). When I put a load behind it (12 reefers) it wouldn't pull very well and the chuffs were way way out of synch. It even stalled on a small .75% grade. So I did some research and came to the conclusion that it was the board inside the loco itself interfering with the voltage. At 50% throttle I was reading 4-5 volts. Ok seems like the issue. I removed Athearns board, tested it and the same thing. (this is where i need help) If you hold the coupler on the tender the loco stalls very easily all the while the chuffs sound like it's going down the track without a care in the world. :mad: So it must be a bind in the rods or somewhere. I removed the worm gears and it "rolls" very well. So well in fact if I put it on a slope it rolls down it. I have adjusted sooo many cv's that I now have it back to factory (cv8 to 8) and still the same. And to top it all off the # boards and headlight will not work... Any help will be greatly appreciated.
 


Where are you measuring voltage? Is the engine at rest or underway when you are measuring voltage? Have you double checked your track voltage?
 
Have you been able to find out anything else?

I actually have tried everything. I am waiting on a motor from NWSL. I removed everything as far as electronics, put it on DC, set the voltage to the point where I was getting 11.5v at the motor and it did the same thing. I can't seem to understand why I am only getting 11.5v in Dcc but so do my diesel tsunami's. I was hoping someone else had the same problem. I guess not. Thanks for your replies, I will keep everyone informed.

Seann
 




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