Alright, so my freinds TA had the pedal falling to the floor with ease. Of course thats the master cylinder right? So we replaced front pads and the master cylinder. Properly bench bled the master cylinder and bled the FRONT two wheels. I have no clue as to what shape the rears are in so i havent looked at those yet. The whole week the brakes were perfectly fine, no problems, nice and firm. Now today he told me he couldnt stop at a point in time, mashed em real hard and the car stopped.. He stated the brakes are now workng off and on randomly with the pedal falling to the floor everynow and then.. What could be the problem? I was told, after removing a master cylinder, you must bleed all 4 wheels. Well I knew this at the time but he insisted that we just do the front two as we were strapped for time.