I was in the same situation yesterday. But what was weird was that I was going up the mountains and I couldn't get any speed. Floored in 3rd I was still slowing down while a older Cavalier was catching up. I only had 250 extra pounds with me. Even on the straight aways when I'd accelerate it would try to move but then shrink back and almost wanna slow down. Why is it that when I got back to sea level it picked up? It shouldn't be that bad at 400m elevation.
