I just swapped a jdm d15b in my 93 honda civic dx, just recently. Did the first start, then multipul starts, runs great. but now my clutch pedal does not have pressure. I've bled it. Gone through enough fluid bleeding it till its clear. I've changed up for an old slave cylinder, off my parts car. Pedal still to the floor, after bleeding. Would my master go bad in 3 days of sitting?! and whats all this talk about " banjo " washers? Are they right behind the slave cylinder rubber hose? Lastly What is that connector bit on my firewall from the clutch master to the rubber hose before the slave?

Thanks so much for the help w/o wheels untill this problem is solved...

 

The MS wouldn't go bad just from sitting for three days but they can go bad without warning. If you installed a new clutch, the increased pressure needed could push a MS about to fail over the edge. Banjo washers are copper washers used with banjo bolts like the one holding your fuel line to the fuel rail. Not sure about the connector bit you're referring to.