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Why does my brake pedal go to the floor when the car is running?

(2000 Ford Taurus)
in Cincinnati, OH on June 23, 2014
Driving my car one day and everything is fine, I park and let it sit for 2 days before driving again. But this time when I start the engine and try to shift to drive my break pedal goes all the way to the floor I can't figure out what is wrong. I checked for leaks, found none I added break fluid and still they don't work, what else could it be?
Displaying 1 answers & 2 comments
Popular Answer
on June 23, 2014
Internal leaking of the master cylinder. How empty was the reservoir , that you needed to add brake fluid?
on June 24, 2014
It was low, does this mean I have to replace the master cylinder ?
on June 24, 2014
NO , at this point , it should be properly diagnosed by a qualified person(s), you may have problems elsewhere in the system.
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