Just bought this vehicle and while sitting at light noticed the pedal slowlllllly sinking. Found no leaks and like everyone else on the Internet I figured it was a mastercylinder car has 120k on it, well taken care of. So I put a master cylinder on it and figured it may be due for a complete flush anyways so what the heck. Unfortunately....that fixed nothing! The problem is still there exactly as before! It does eventually get to a point where it quits sinking that is not all the way to the floor but a whole lot of travel to get there! This is an EX model with discs at all four corners. My first impression of the problem was like back in the day where your rear drums might have shoes that are way out of adjustment and the pedal was simply sinking as it filled the rear wheel cylinders. Being that this has 4 wheel disks, that is certainly not going on so the idea of the mastercylinder internally leaking within itself was surely possible. No loss of fluid anywhere. So what can I look to next?