I have presta valves. I am inflation impaired. Followed this web site on how to inflate them: http://bicyclesouth.com/change_tire.htm

I think, however, their picture of the floor pump being in the "up" position is incorrect -- it's in the "down"... right? "Down" should mean the value is parallel to the hose tube, and "up" is perpendicular. I think.

So I set up my floor pump, attach it to the presta valve, flip to the "up" (valve perpendicular to hose tube) position. Lots of hissing. Pump furiously to get more air into the tire than is comes out. Repeat on other wheel.

How do I get the hissing to stop while I'm pumping? Holding the hose head to the valve helps... a little. But makes for awkward pumping. And I never can seem to "fully" inflate my tires.

Argh!