Question about 2000 Buick Century

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I have a 2000 Buick Century. When i press the brake pedal i hear air sounds but brakes still work just not like they should. if i pump the brakes then turn on the engine, the pedal easily goes on to the floor. Is my problem the brake booster or check valve?

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Seems like a vacuum leak. Either the valve, hose to the manifold or the booster itself is leaking air.

Posted on Nov 25, 2013

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Booster

Posted on Nov 25, 2013

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Posted on Jan 02, 2017

keeperoffire
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SOURCE: 94 buick brakes

There could be 2 reasons that the pedal would go to the floor.1 -there is air in the system.If no one has taken a line loose then it will be #2 -the brake master cylinder has gone bad and will need to be replaced.Ther will be directions on how to do this proporely with the replacement unit.if you need further assistance let me know.

Posted on Mar 08, 2009

emissionwiz
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SOURCE: a few seconds after brakes are applied the pedal

you have two problems here, your master cylinder has a leaking seal, the low pedal is resault, the power brake booster rubber diaphram is damaged and leaking from the brake fluid that is getting into it from the master cylinder, these are sold as a unit that has been rebuilt.

Posted on Sep 28, 2009

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  • 34 Answers

SOURCE: 1998 Buick Century Low Trac light comes on and car skips.

have you bled the brakes? If you have, you may need to do it again as there sounds like there's an air lock in your lines.

Posted on Mar 14, 2010

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SOURCE: 1999 Buick Century Custom _

nope you have to replace them.when brake booster diaphram leaks you cant plug them.i have bought one at salvage yard in good shape.until i got a new one.get your brake booster from inside salvage yard where they stock them inside out the weather.dont take any brake booster off old outside cars been in all kinds bad weather. there vacuum diaphram probably dried up will leak also.

Posted on Jun 11, 2011

Mustgo
  • 2359 Answers

SOURCE: 94 buick century brake pedal

Check the floor for brake fluid.
The caliper / wheel cylinder and/or brake hose is leaking.
==== Master cylinder and reserve tank can also leak. Just look for brake fluid spot,

Replace the damaged part and bleed the brake.

Posted on Sep 07, 2011

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One can press and pump on the pedal when the car is off and hear the 'rush' of fluid which sounds kind of like air rushing out of an inner tube.

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