$580 later and...
Picked it up from the shop on Friday. They found that the thumb warmer switch was shorting. Okay, great, lets unplug that sucker and try it. Servo cycles and I load it up. Get up to unload Saturday and the tach and headlight are not working. Open the hood and start looking, everything looks good. Screw it, I'm going anyhow. A mile up the road and I get the tach and light back, cool. Ride for a few hours with no problems, get stuck about 200 yards from my buddy who is also stuck. Got my sled out of the 4' trench (damn, that thing is heavy) and put on the snowshoes. I pack down a launch-pad and give er' the wood. Get another 25' and into limp mode she goes. Chit, stuck again. Radio my buddy and tell him he is on his own, get that sucker out and come help me get mine turned down hill. We get the last little climb heading back to the truck done (just kept it pinned or it would start limping again) and stop for a beverage. While we are sitting there I pull the plug on the servo to see what happens, fire it up and get the limp mode. I shut it down and plug it back in. We finish our beverages and fire up to head down. Thing runs like a champ, no limp mode, all the way back. I hate intermitant electrical problems.
The only thing that I have messed with, electrical wise, is the hand warmers and that was way before this started. No EGT, no rubbed wires, impulse to ECU is good, cables are in spec & valves are squeeky clean.
I'm going to hit all the connectors with some dielectric grease tonight. If that doesn't do it I guess I'll be spending the $100 on a new harness.
And yes, the Doo valves will go on as soon as I get this issue resolved.