Installing asr braided 2-line brake lines. Took old stuff off, installed new lines. No fluid from master cylinder unless I put my thumb over the outlet hole for it to build up pressure, then it seems to work fine until I take my finger back off. Tried everything I could think of. Tried a check-valve bleeder, tried with bleeder valves open, bleeder valves closed, nothing comes out of master cylinder or builds any pressure at all except maybe a tiny dribble unless i put my thumb over the outlet. Master cylinder was working fine before I started messing with things again. WTF am I doing wrong? Please don't tell me that my master cylinder is trash, i don't want to hear that. That'll put some extra crap-flavored frosting on this awesome day.

 

are the copper washers sealed all the way and if the line on all the way...I would check to see if you can wiggle the line and get it lined up, since it sounds like there is something obstructing it from seating all the way

 

but shouldn't I still be getting fluid out of it, even if there was a leak in the line? Nothing at all will come out of the master cylinder unless I cover up the outlet hole directly at tye master cyl.