Question about 1995 Oldsmobile Ninety Eight Regency

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Brake pedal is soft I have to pump it two or three times for it to get hard

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Air in system, you need check it out, master cylinder seals worn, try bleeding system first.

Posted on Oct 28, 2013

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Posted on Jan 02, 2017

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1 Answer

Brake pedal is hard when vehicle is not running,but is soft when the 2005GMC Envoy is running.changed the brakes and rotors?


This sounds like a vacuum or hydrolic issue. If The pedal is spongy soft while its running it indicates air in the brake line, or faulty master cylinder, or faulty brake booster. A faulty master cylinder would get hard after a few pumps of the pedal. Since the pedal is hard when it is shut down, it makes me lean toward the brake booster.

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when your brakes get hard 99 % of the time it is the brake booster if they get soft or spongy it the master cylinder

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Brake pedal soft after changing pads and bleeding brakes


You will need to bleed the brake system. I would start with the rear brakes lines and work towards the front.You must have key off engine off when bleeding brakes, apply pressure on brake pedal 10 times and hold. The brake line is now ready to be open. Open and let the stream of fluid come out and close the line tight. Then release brake pedal once bleeder screw is close. This procedure must be repeated twice front and back. After, brakes have been bleed pump the brake pedal before putting in drive.
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I have a 1981 Corvette and my pedal has to be pumped to get a hard pedal.The Brake Master cyl. has been changed twice in 5 days the brake fluid level remains full.The brakes have been bled 5 times and on a...


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1 Answer

I am working on a 2004 dodge caravan with a soft brake problem.i have replaced the rear shoes and adjusted rear brakes,also replaced front rotors and pads.i have also replaced the master cylinder.after...


try bleeding the master cylinder at the lines first as it indicates that there is still air in the pistons
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do it for the other line and then bleed all the brakes starting at the longest line first and ending at the shortest line

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1 Answer

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this problem is caused by a vacuum leak inside the power brake vacuum booster unit (rubber diaphram), here is a photo of that part which is under the hood, the brake master cylinder is mounted to it.

f121552.jpg

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