OK, so I am posting back... My wife took the car today, and again it was very cold. Wind chill -20F. She said she was able to get it to 40 mph (she is pretty tenatious) but it had no power climbing any hills. She got to where she needed to go. I had her make sure the ignition wires were seated good and had her put a can of fuel line drier in the tank. It ran fine after that. It sat several hours then back to not wanting to go again. I went to where she was after work and ran the codes. Again, 1-1-1. I thought I'd drive it to see what was up, and it ran fine. I drove it 20 more miles with no incident.

In the last 5000 miles I have done (to the engine) the timing belt service, belts and hoses, complete tune up, fuel pressure regulator, oil seperator, flame trap and all associated hoses, main fuel pump, engine computer, oxygen sensor, coil, misc. gaskets and seals, battery, and exhaust system. What I have not completed yet is the air box thermostat valve. Would that be a possible culprit? What have I missed that would cause this problem? Would the AMM create this intermittent issue in the very cold, but not anytime above 25F?

I did thoroughly inspect the intake hose and it looks good.

Thanks again for your consideration in this issue.
Eric