My Ford Explorer has a problem with the brakes, when you press the brake peddle to the floor, it will make a whisssh sound. When you are trying to stop, it doesn't grab until the peddle goes all the way down to the floor, would you think the sound would be coming from the master cylinder or the power booster? Can some one bleed the brakes by hand if the system has rear anti lock or does this have to be done by a mechanic shop?
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