Question about 2003 Pontiac Aztek

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Brakes Air sound coming from booster inside the vehicle.

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Do the brakes feel softer then normal? if so then the boost needs to be replaced.

Posted on Jan 07, 2009

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When i press the brakes the pedal goes to the floor and i get like a air sound coming from the pedal area

it appears that the brake booster is faulty and that is the air noise . Replace the booster. The brakes going to the floor indicates air in the system bleed the brakes starting at the longest line first finishing at the shortest line.

Nov 11, 2013 | 2004 GMC Sierra 1500 Crew Cab

1 Answer

1997 suburban press brakes hear air where is the hose

If the vacuum (noise) is coming from the inside of the vehicle there is a good chance that it is the brake booster that is connected behind the brake master cylinder on the firewall....

Oct 23, 2012 | Cars & Trucks

1 Answer

Why would my brakes hiss when I step on them and cause the engine to rev up when I do this? It also makes the vehicle very hard to stop.

It sounds like your brake booster is leaking. The air hissing is the air going into the leak. This extra air goes into the engine and causes the engine to rev up. The booster is what makes it easy to push the brake, (when it is working correctly) which is why the pedal is hard to push.

May 31, 2012 | Chevrolet Blazer Cars & Trucks

1 Answer

My rpm is accelerating high when i step on brakes

sounds like you have a vaccum air leak in your power brake booster. you need to check the vaccum air lines going to your brake booster,the booster is located behind your brake master cylinder it is the large round tank right behind your brake master cylinder,,the booster itself has i diaphram inside it, every time you press on the brakes you are loosing vauccum with then causes your idle to will have to change out the booster as a complete unit...they cost about $100-$150 for a rebuilt one at autozone go to the store or the website to see what the part looks like....

Aug 11, 2011 | 2003 Dodge Stratus

2 Answers

Breaks are hard to push and I hear air from under the dash, and Master Cylinder fluid is very dark. How do fix these problems?

sounds like you need to replace the brake booster, and flush the entire system. the noise you hear is air leaking out of the booster. hope this helps. good luck.

Nov 09, 2010 | 1995 Chevrolet Blazer

1 Answer

Brake pedal making hissing nosie

Sounds like the rubber diapraghm inside the power brake booster has ruptured and is letting in air. You will need to take vehicle to a brake specialist to have it checked out. If the leak gets worse you will lose most power assistance to the brakes & the engine will idle erretically.

Aug 28, 2010 | 2004 Dodge Intrepid

1 Answer

Brakes go to the floor and have an air sucking sound when you press the pedal. Replaced the master cylinder, new cap and vacuum valve on the booster. Still nothing but it sounds like sucking air in the...

You have a leak in the power booster diaphragm...the booster needs to be replaced. It's not a high failure item and can usually be located in most scrapyards.

Jul 07, 2009 | 1991 Ford Mustang

1 Answer

Braking Alarm

just came across your posting, not sure if you have repaired the vehicle yet or not. just reading through this and it sounds like a faulty brake vacuum booster. the booster supplies power to the brake system by using engine vacuum

Nov 01, 2008 | 2001 Volvo V70

1 Answer

Power booster

replace the power brake booster. there is a rubber boot inside the booster that has a hole , and when you depress the brake it opens the hole.

Jul 21, 2008 | 1997 Chevrolet Lumina

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