Quote:
Originally Posted by werminghausen
Then brake got worse and it might had to do with air entering the system with the slowly failing and later leaking rear brake line. (My thought is it might have drawn air a while before brake fluid leaked out?)
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During last bleeding session with my wife who operated the pedal sloooowly. I could see that the front brakes were not dragging at all and
to my surprise I saw that the rear brakes would not engage when the pedal was pressed without key. I cannot explain why this is so. Normal brake systems (Vacuum booster) would operate the rear brake of course during bleeding.
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Typically the metal lines will not slowly leak and let air in. They seem to just burst, usually coming to a full stop when lots of pressure is needed.
No vacuum on these systems, you have to have the key on and brake slightly pushed so the pump runs to bleed the air out, mainly the rears if I recall correctly. This may set a brake beep alarm which is annoying. There's also a procedure to pump them up a bunch of times but I haven't found my past problems to be fixed by that procedure. It seems anytime I've ended up with spongy brakes when they were good months before, it is because of a bad caliper or pads that are stuck. Both front brakes were not grabbing? I think I'd focus on that assuming the bleeding process has been followed.
Have you looked at the stickies section for the proper brake bleeding procedure?
