排气 is just a normal procedure of bleeding

回答: 刹车问题请教高人noise2009-12-06 16:02:59

looks like you don't know how to bleed, that concludes that you probably didn't bleed well so your system behaves abnormally. from that point, i'd recommend you get a professional bleeding done first, hopefully you will get it cured.

in case it is still having mysterious behavior after a formal bleeding, consider changing master cylinder then bleed. good luck.

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