I have a general brake question. If the MC, booster, and calipers have been changed and system bled 3 times, what would cause the pedal not to stay up? It will pump to bleed the system but it goes back down. It goes down faster when the car is running, I guess when the booster starts working. This problem is on a '96 Taurus wagon not a Mustang. I just figured brakes are brakes are brakes on a Ford. Thanks in advance.