I had fading brake pedal. checked all 4 wheels no leaks and no leaks any where else. I replaced the master cylinder bench bled the master cylinder and all 4 wheels. Had good pedal until I started the car the pedal would slowly fade to the floor. First thought a bad master cylinder. So I replaced it. Had the same problem. Ok so maybe I had 2 bad m.c. I replaced it again. Still the same problem. I can believe having gotten a bad master cylinder maybe even 2 bad ones but 3 the odds of that are extreme. I am at a loss to what it could be. ABS appears to be fine with no codes and or leaks. Help!!!!
My car has 140000 miles.
My car has an automatic transmission.
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