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Is the master cylinder bad if the brakes pump up?

Updated: 8/17/2019
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Q: Is the master cylinder bad if the brakes pump up?
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I had no brakes when i pressed them they were soft and i barely go stopped 98 Chevy blazer?

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Why does the brake pedal still go to the floor even after bleeding the brakes on a 99 Mercury Villager If I pump them they will work but after sittin for a small length of time it feels spongy again?

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