duckbill

Over the past few weeks the brake pedal on my 95 Civic Ex (195,000
miles)with ABS would sometimes sink a little at stoplights and statrted
feeling a little funny the first time I applied them lightly in the
morning. My first thought was to bleed the brakes. And, while bleeding the
brake pedal yesterday, I lost all pressure and the brake pedal consistently
went to the floor. I had placed a piece of wood under the pedal so the
brake stroke would be the same. The search feature of this wonderful forum
led me to purchasing a master cylinder. The problem is now fixed.
What I don't understand is how a master cylinder could fail so
completely because you have two seperate hydraulic brake systems? When my
pedal went to the foor, it meant I had lost both of these brake systems.
There were no external leaks, and I never had to add brake fluid. Had one
of my brake systems failed a while back and I was not aware of it? Thanks
in advace of any thoughts on the issue.