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Power brakes feel stiff like manual

Power brakes intermittently get stiff like manual brakes. sometimes accompanied by a sound like rushing air. brake fluid is full.

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  • 232 Answers

Your having a problem with the vacuum booster,check the hose connection at the booster,if the hose is fine the diaphram in the booster is leaking and about to fail.

Posted on Apr 20, 2009

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1 Answer

Power failure when braking problem


sounds like your power assist vacuum unit is dead. i.e. your power brakes. pump your brake pedal 3 times and hold it. turn on engine-if the pedal sinks to floor its the brake master cylinder, if it pulses and comes up with your foot on it its its neither but if it stays right where it is>? BINGO-power assist! good luck.

Oct 17, 2013 | Pontiac Firebird Cars & Trucks

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Hard brake pedal


Check The Hose Leading To The Brake Booster For A Leak. If Good Check The Check Valve To Make Sure It Working (Sucking In Air) If Good The Brake Booster Needs Replacement.

Jun 06, 2013 | Hyundai Cars & Trucks

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I drive a 1995 Cadillac Seville SLS. My brakes have become unresponsive. they feel stiff, and I have to put both feet on the brakes and stand on it to slow the vehicle. pressing the brakes is...


I wouldn't install a used brake booster,but you could

You don't need instructions & a list of tools

If you & your friend together need that,you shouldn't
be doing that job

You will find 4 nuts in plain site, on the firewall holding it on.
You know enough to remove the brake tubing on the master
& can unbolt it ,to swap to different booster. Not sure
you can leave the brake lines in place until you try removing
the booster.

Before you do all that ,remove & check out the vacuum
check valve on the booster with the hose going to it

They are a somewhat common replaced item. You may
only get a couple in your life time,but they do fail somewhere
every day.

Jun 13, 2011 | Cadillac Seville Cars & Trucks

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I have a 2000 oldsmobile intrigue; i went to go get new brake pads and when i got in my car to leave from the shop my wheel was stiff. I told the shop and basically they cleaned out my power steering fluid...


If the power steering was ok before the brake job, I would suspect something went amiss while the mechanics were working on the car. And why, when you returned to the shop, would they clean out your power steering fluid? I don't think I've ever heard of anyone doing that before. Unless they knew there was something wrong with the power steering fluid. This may sound crazy, but I'm thinking they topped your power steering reservoir off with hydraulic brake fluid when they were working on your brakes. If, in fact, they did put brake fluid in the power steering, changing the fluid would only remove the brake fluid from the reservoir. The rack and pinion assembly would still have the contaminant inside it, which could cause the steering problem you described.

Dec 31, 2010 | 2000 Oldsmobile Intrigue

1 Answer

No braking assist, rushing sound (air escaping)wheng brake pedal applied.


HI this sounds like the vacuum booster has a leak in the diaphragm. That is why you hear that sound when you push on the brake pedal. With out the vacuum to help this leaves you with a very stiff brake pedal. You will need to replace the Booster which is located behind the brake master cylinder and on the firewall. Good luck

Sep 07, 2010 | 1995 Volvo 960

3 Answers

Why do i hear air when i press the brake pedal


well, you don't really hear air when you press the brake pedal. You might hear hydraulic fluid going through the valves in the master cylinder, that sounds like air flowing through a vent. But, I assure you, it is not air.

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.

It's a common mistake to believe a rush of air is being heard when pushing on the brake pedal.

Aug 26, 2010 | Chevrolet S 10 Cars & Trucks

1 Answer

95 chevy suburban brakes are stiff and pedal sounds like air is rushing out win you press on it. know what it could be?


it sounds like the brake booster is gone , it vacuum operated,
so it makes a hissing sound when leaking .

Aug 14, 2010 | Chevrolet Suburban 1500 Cars & Trucks

2 Answers

Intermittent braking problem


yeah you mostlikey have a abs pressure switch problem. which helps in the power assist , and or the seal in the brake booster is going bad

May 27, 2009 | 2003 Mazda Tribute

1 Answer

Power brakes feel like manual


Start by checking the fluid level

Apr 10, 2009 | GMC K1500 Cars & Trucks

1 Answer

Mazda MPV 2002 Power brakes lose power with a cold engine


There is a vacuum check valve to the brake booster. This will be the likely fault.

Dec 15, 2008 | 2005 Mazda MPV

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