Ok Iv had problems with the brakes on my 92 civic dx for a while. I need to get them fixed so I can sell the car. Iv replaced both front and rear pads along with the master cylinder twice. I get them all bled, then they are fine. I drive it for about 5 miles. I park it and come back out and they drop to the floor. Today I repeated this process of bleeding them for about the 40th time, drove it, came home and when I pulled in my drive way they droped. Any Ideas? Could it be the booster? Iv replaced everyhting else. What about the line coming from the booster? Mabe its a drirotted peace of brake line letting air get in when I let the car sit? I'm getting realy tired of this car. I have 3 other honda's and a cuple of other cars and Iv never had any problem like this. Iv had a cuple of people look at it and they cant figure out anything. HELP!!!