So, I'm driving the Wankle, and all of a sudden my clutch pedal feels weird, like there's air in the line. Then It went all the way to the floor, as I'm screaming, "WTF"... I'm glad my FC can coast 5 miles and did so back home. I have a SS clutch line, fluid in the master is full, slave bleeder screw is nicely tight with also no visual fluid leaking. If I pump the pedal with my hand it kind of builds pressure then it's gone as fast as it came. When loosened the bleeder screw and press the pedal fluid came out. Is it the master or slave?

 

I would just replace both of them. I think almost everyone has experienced this with a rx-7. Both parts can be had for under $20 each i think from autozone or ebay. and its a safe bet to replace them both, then no worries. Usually fluid leaking past the piston in the master.