Brakes act like has air in line or something goes to floor then you let up put on again and work just fine not leaking fluid. maybe mastercylinder bad?
Hi and welcome to FixYa. I am Kelly
It certainly is the master cyclinder that has failed. The piston seals are passing fluid by them and your feeling a mushy pedal or having to "pump" them to get the brakes to work.
A word to the wise once this symptom appears the day will come when you hit the brake and nothing will happen. (i.e an accident waiting to happen)
PLEASE do not ignore the need to get it fixed for you own personal safety.
On a purchase parts note: There is nothing wrong with getting a rebuilt master cylinder to replace the one in your car. (NAPA / Autozone)
Thanks for using FixYa! If you need further assistance just post here.
Kelly
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