why do i hear air from my brake pedal and why does it go to the floor on 1990 Mercury Cougar

my brake pedal goes to floor and you hear air coming out of the pedal area.car is hard to stop

by in San Bernardino, CA on November 21, 2011
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1 answer
ANSWER by , November 21, 2011
ripped diaphragm from the booster. the power brake booster has to be replaced. Roy