Power Brakes on 1992 Buick Park Avenue

Due to many miles on the car, my power brakes are failing. The pedal fades with foot on brake and car rolls until I apply more pressure. How do I get it fixed? I've had my brakes and brake fluid thoroughly checked so don't tell me that is what is wrong!

by in Bothell, WA on August 18, 2009
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2 answers 1 comment
ANSWER by , August 18, 2009
It would be very difficult to know what is wrong without seeing the car in person, but I have a question, is the pedal sinking to the floor? Would you describe the feeling of the brake pedal as "Soft", "Spongy" or "Hard" when you apply the brakes?
COMMENT by , August 19, 2009
To lawrenceg: Braking is normal at first stop, then pedal fades 1/4" to 1/2" (not to floor), car rolls, exert more pressure on brake and car stops moving. When it is quiet i.e. engine not running, You can hear a "swoosh" when applying brakes
ANSWER by , January 19, 2011
U have a leak in your brake system somewhere air is getting in your lines. U need to check for leaks and bleed your brake system.