I have a 1979 CJ-7, 258 cu. In, 4 speed, manual brakes, factory disc front, drum rear. I have replaced literally everything; master cylinder, hard lines, hoses, calipers, bearings, hubs, rotors, pads, proportioning valve, wheel cylinders, drums, shoes, hardware, EVERYTHING. And I didn't cheap out either, I got the "better" parts, not the cheapest. I cannot get a decent, sustainable brake pedal. We have bled, and bled, and bled, almost 4 quarts run through the system. If you pump the pedal about 30 times, the pedal comes up about halfway (halfway decent pressure, not great), but if you take your foot off the pedal, count to five, and step on the pedal again, it slams to the floor. It has no leaks anywhere. My first thought was a bad reman master cylinder. I have already tried 3 reman masters and 1 brand new master, same problem every time. It has damn good fluid flow to all 4 wheels. I have been working on cars for a long time, but I am completely lost. I don't know what else to do!
Thursday, May 17th, 2012 AT 3:26 PM