Originally Posted by
calstar
Nope, no indexing, acts like a friction shifter. The upshift takes a ton of travel to to get the chain to move, I mean way over towards the stem, no "crispness" at all. Downshifts index, up no. Pulling the cable along the dt shifts about like brifter does, except with better feel(!). I will pull the cable and clean, see if that helps. The cables and housing are not the originals, 4yrs +- on them.
You should be able to shift three cogs larger in one motion.
If the shifter isn't engaging soon enough for that to happen there's something wrong with the front paddle assembly - sometimes the spring which holds it forwards against the brake lever and engages the pawl breaks, some people have broken the metal bit which holds everything together.
If it is moving the index cam and drum three cogs bigger but just not holding when you get to a gear it's worn/broken G-springs and/or the carrier.
The Campagnolo G-spring mechanism is really simple (basically they turned their down-tube shifter inside out, dropped from three to two springs, and added ratchets for up and down) so it shouldn't be hard to see what's going on.