Question about 1998 Chevrolet C2500

How do u know power booster is bad

When i push brak sounds like air coming out

1 Answer

Stephen

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21,873 Answers

That is normal to a degree. When a booster fails, the pedal is very hard to push and the engine can have a vac leak.

Posted on Sep 24, 2012

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Have your vacuum booster checked for leaking, sometimes the one way valve that holds vacuum in the booster fails, It is in the hose going to the booster from motor.

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Air pressure sound when i push on the brakes

air pressure sound may come from a leaky vacuum hose or bad check valve at the booster or master cylinder.

But, I think that it's normal to hear a soft hissing sound when depressing the brake pedal which comes from hydraulic fluid going through the passage ways.

Is the pedal hard?

Sep 30, 2010 | 1997 Chevrolet Suburban

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Its a constent hissing from my brakes in my Mazda 2001 tribute. The noise does stop When i press on the brakes but as soon as i let off them the hissing continues. Ive read it could be the brake booster. ...

It is the booster, but it might not be abnormal.

Vacuum from the engine is supplied to the booster, and vented if the brakes are not being applied.

When you step on the pedal, the movement of the pedal blocks the vents, allowing the vacuum to build up. That vacuum then pulls on a diaphragm, assisting you in applying the brakes.

Most people can’t hear that venting, some can.

You should, of course, have it checked out, but it sounds as if this might be normal operation.

The booster is bolted to the firewall, and then the brake master cylinder is bolted to the forward side of the booster.

To replace it you disconnect the brake pedal, remove the master cylinder, take the vacuum line off the booster, unbolt it from the firewall.

Install the new booster by reversing these steps.

But I don't think you need one, from what you say.

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My brakes are hard to push down and it sounds like air is coming out of the brake pedal

This one I can be fairly certain of. It sounds like a rip in the vacuum power brake booster diaphram. Usually you just replace the whole power brake chamber, which includes the diaphram. You have to first remove the 2 bolts holding the master cylinder to the larger booster chamber, but you don't normally have to open any brake lines.
When replacing, make sure the brake pedal rod goes down the center of the new booster, and that there is sufficient clearance or freeplay in the pedal rod when done. (like .1" is all you need)
Should not have to bleed after done.

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2001 Chrysler Concorde pressed the brake

That sound you hear is coming from the Vauum Brake Booster...Sooner or later the Brake Pedal will get hard, because the seal inside of the Brake Booster is leaking..And the only way to repair it, is , to replace the Brake Booster...But also check your Vacuum Hose that is instaaled on your Brake Booster..It goes from the Brake Booster, which is behind the Master Cylinder...From there to the Intake Manifold...Just make sure that there are no cracks in that hose, and make sure it is on all the way...because if the hose is bad, then thats all you will have to replace....Goodluck...

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Brakes changed noe sounds like air is being

sounds like the brake booster is going bad, its loseing vaccum,booster needs replacing,when leak gets big enough brake pedal will be real hard to push, hope this helps,

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When i push on brakes it comes to a fast stop the brake pedal goes down real quick and sounds like air when i push on brakes

sounds like theres air in brake lines have them bleed

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How do u know power booster is bad

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Stephen

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When I push the brake in on my 2001 Ford explorer and it sounds like air coming out is it the break booster?

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Intermitant brake pedal travel issues 98 sable. sometimes braks feel normal and firm then the next time pushing the pedal it seems like the petal travels further than the last time. Has new NAPA master...

Air pressure sound when i push on the brakes

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My brakes are hard to push down and it sounds like air is coming out of the brake pedal

2001 Chrysler Concorde pressed the brake

I have a 1994 volkswagon passat. I am having problem with the brakes, it has a abs light and brake light on , in the dash. must also have to push hard on the brakes to stop. Can anyone help diagnose what...

Brakes changed noe sounds like air is being

When i push on brakes it comes to a fast stop the brake pedal goes down real quick and sounds like air when i push on brakes

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1998 C2500

When I push the brake in on my 2001 Ford explorer and it sounds like air coming out is it the break booster?

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How do u know power booster is bad

1 Answer

Stephen

Add Your Answer

Attachments: Added items

Related Questions:

When I push the brake in on my 2001 Ford explorer and it sounds like air coming out is it the break booster?

I have a v6 3800 Pontiac grand prix the brake pedal goes all the way to floor and when pumping them sounds like air coming from under dash and idle speed slows way down

Intermitant brake pedal travel issues 98 sable. sometimes braks feel normal and firm then the next time pushing the pedal it seems like the petal travels further than the last time. Has new NAPA master...

Air pressure sound when i push on the brakes

Its a constent hissing from my brakes in my Mazda 2001 tribute. The noise does stop When i press on the brakes but as soon as i let off them the hissing continues. Ive read it could be the brake booster. ...

My brakes are hard to push down and it sounds like air is coming out of the brake pedal

2001 Chrysler Concorde pressed the brake

I have a 1994 volkswagon passat. I am having problem with the brakes, it has a abs light and brake light on , in the dash. must also have to push hard on the brakes to stop. Can anyone help diagnose what...

Brakes changed noe sounds like air is being

When i push on brakes it comes to a fast stop the brake pedal goes down real quick and sounds like air when i push on brakes

Not finding what you are looking for?

1998 C2500

When I push the brake in on my 2001 Ford explorer and it sounds like air coming out is it the break booster?

Open Questions:

HOW TO REMOVE MOTOR 98 CHEV 2500 454

1998 CHEVY TRUCK 2500 5.7 ENGINE INTAKE MANIFOLD TORQUE SPEC

firing order for 1998 chev 454

how do i check manual trans fluid on 88 chevy 2500

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