This is now written some 2 years after I posted the problem. In between, I'd tried certain things and still had the same problem. I never know if the changes I made will work, until I'm in the mountain areas again.

Thankfully, and by accident, I saw Kent Bergsma's video on YouTube about cleaning your TANK filter. I didn't even know the car had one. I had my general mechanic take the filter out, and sure enough, it was fairly clogged. He cleaned it, put it back in, and the car makes it up the hills of Va/W. VA again.

If you do this, MAKE SURE you have a NEW FILTER and a proper tool on hand, because it's tight to get into that area. You don't want to have your car apart, and find out your filter got damaged when you took it out, and it's going to take 3 days to get one. If anyone needs one, please buy mine. I have the tool and a new filter on hand just in case, but I (thankfully) didn't need it. Email me (not message) if you need it. (this written Nov. 2014)