I have a Bontrager Air Support Plus mini pump that, well, doesn't work.
It doesn't matter if I'm pushing the plunger in or out the pump basically can't get any air from the outside, if that makes sense.
If it's off the bike and I put my finger over the end, it seems to try to pump air out of the nozzle when I'm going in or out. When hooked up to the bike tire, the plunger simply can't move either direction.
Weird, I know, anyone know why it might be doing this? Getting ready for a trip and can't take my large floor pump.