I'm fixing up an old road bike and I'm having some trouble with the front derailleur. I've got the rear shifting pretty well, but this one just doesn't want to change rings. Even when I get get it to shift up to the big ring, the chain will rub against the derailleur cage like it's not moving out far enough. Adjusting H limit didn't help much.
I feel like the spring isn't flexing enough. When I try to shift it, the cable gets very tight but the derailleur itself doesn't move very much. Any thoughts?