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.