1985 LE van 172,000
Brakes seem fine for a while. Then all of a sudden to the floor. A pump or 2 and they are solid again. So I'm in the habit of always pumping.
I may go all day with no problem. Then to the floor. No leaks, res is full.
I did the rear shoes and cylinders(AutoZone), and replaced the master cylinder(rebuilt O'Reileys). I have bled and re-bled flushing the system. Still the same. So I got some new calipers(AutoZone reman) and am about to change them.
Any thoughts on this?