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spongy brakes

 
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grimsin
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2005 Chevrolet Impala


PostPosted: Sat Feb 23, 2013 6:29 pm    Post subject:  spongy brakes Reply with quote

when I go to work/leave work my brakes feel "spongy" and i don't have much stopping power..after 30-40 seconds my brake pedal firms up and its good to go.
any ideas Question

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outonthetiles
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2000 Chevrolet Impala
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PostPosted: Sat Feb 23, 2013 7:30 pm    Post subject:   Reply with quote

When's the last time you bled your brakes. Sounds like you have air in the system, or a bad master cylinder. Any visible leaks?

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grimsin
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PostPosted: Sat Feb 23, 2013 8:00 pm    Post subject:   Reply with quote

no visible leaks and the brake fluid is full. ive never blead the brakes, wouldnt air only get in if i had a leak?

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topgun
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PostPosted: Sun Feb 24, 2013 2:01 pm    Post subject:  brakes Reply with quote

Ditto as outontheiles suggests. And Yes to your question. It is possible for air to get in through the master cylinder seals. Bleed system first, if problem persists, ensure no pinhole leaks in lines etc, If all OK replace master cylinder. Cool

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outonthetiles
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PostPosted: Sun Feb 24, 2013 2:40 pm    Post subject:   Reply with quote

Yep, bleed the brakes and if the problem persists, I would suspect a faulty master cylinder.

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Jnibbs24
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2003 Chevrolet Impala


PostPosted: Fri May 03, 2013 8:14 pm    Post subject:   Reply with quote

I have the same issues, makes a humming sound, spongy feel to them. But mine happens random times when I'm driving, not good, that's how I got one tow hitch in the front bumper. I then thought My brakes just needed flushed, took it to goodyear, they did the flush, problem is still there. So like I read above, Master cylinder is more like it? Would the shop not even check that out while they're bleeding that anyways?

Thanks!

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topgun
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PostPosted: Fri May 03, 2013 9:30 pm    Post subject:  brakes Reply with quote

a better, more acommadating and competent shop would, yes. Cool

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grimsin
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PostPosted: Fri May 03, 2013 10:30 pm    Post subject:   Reply with quote

My issue was in my head, after driving commercial truck for 14 hours a day i would get used to the super hard brake pedal Embarassed lols
good luck with finding your issue.

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Jnibbs24
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PostPosted: Fri May 03, 2013 11:28 pm    Post subject:   Reply with quote

yeah mines deff not in my head lol

read around and youtube that this could be the issue..

http://www.rockauto.com/catalo.....pk=1821754

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Pitch Black SS
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PostPosted: Mon May 06, 2013 1:50 pm    Post subject:   Reply with quote

the harness is usually to fix the CEL / Serv Trac / Brake light issue.

Im thinking a fluid issue, either air in lines, master cylinder, or even a hose starting to break down.

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Jnibbs24
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PostPosted: Mon May 06, 2013 4:58 pm    Post subject:   Reply with quote

I do receive the service traction system light, as well as ABS and traction off light, usually before that goes on I'll get a traction active light as if I'm trying to take off quick and get some slippage. Smh.

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VictoryRed09
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PostPosted: Mon May 06, 2013 6:27 pm    Post subject:   Reply with quote

if it is only 20 to 30 seconds.
It could be the ABS system has not become fully alive.

Start the car, keep yuur foot on the pedal, and if you feel he pedal suddenly stiffen up, it is the ABS.

Not too much to worry about unless the time increases to get the pedal back to normal.

Also .. like everyone else says .. bleed the brakes to get new fluid in the lines and ABS system.
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