My daughter owns a 1992 Sable. This is the first Ford product I ever did brakes on. We replaced a froze-up passenger side rear brake caliper. While bleeding out the air I noticed almost no pressure. Even with the supply line removed, the fluid was barely flowing and the pedal ever so slowly went to the floor. Little by little we finally pushed out the air. This didn't seem right to me so when we replaced the pads on the opposite side, driver's rear, we decided to check the flow. Contrary to what we had on the passenger side, when we pumped up the system and I cracked the bleeder valve we had a full stream and the pedal went straight down. Does anyone know why we have flow to one side and not the other? From what I can see (pretty cluttered there), the master cylinder only has two lines coming from it, one for the front and one for the rear. Is there another valve somewhere that may not be switching correctly? Any ideas or experiences with this would be appreciated.