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Does this sound like a bad master cylinder?

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Old 11-26-2008, 11:50 PM
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Default Does this sound like a bad master cylinder?

So yesterday I was driving to work and go to stop at a red light when I realize that I have no brakes until the pedal is like...basically on the floor. I'm guessing its the master cylinder but what would be some other possible issues? I had just driven it home from school a couple hours before and it was fine, so this came on pretty sudden.
Old 11-27-2008, 12:30 AM
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Most likely you are low on fluid for some reason--could be a leak somewhere. Check that first. If your fluid is good, bleed the system and check for leaks and remaining pad thickness at all 4 corners. Then try it again. If it's still not acting right, then suspect your master.
Old 11-27-2008, 11:23 AM
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What did you find? Leaking is my guess since that causes air to get in the line. Can you pump it up?

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Old 11-27-2008, 05:38 PM
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Look at your brake fluid reservoir. Do you have any fluid in there? I had a hard brake line corrode and leak earlier this year. Shot all my brake fluid out of the leak.
Old 11-27-2008, 10:31 PM
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Haven't had time to really check it out. I did however check the reservoir yesterday and there was still fluid left in it. Thanks for the input, guys.
Old 11-27-2008, 10:34 PM
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could have an air pocket in the system, tell me when u press on the pedal is it nothing then all of a sudden it grabs, or does it slowly grab.
Old 11-28-2008, 10:23 PM
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Originally Posted by Blacklightning744
could have an air pocket in the system, tell me when u press on the pedal is it nothing then all of a sudden it grabs, or does it slowly grab.
Its like nothing, then I have just a bit of braking power at about the end of the pedal travel. I can get a bit more if I put a lot of pressure on the pedal but its still not a lot.
Old 11-28-2008, 10:35 PM
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that sounds like a brake booster problem, check your vacuum line for any tears or holes.
Old 11-28-2008, 11:12 PM
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X2 also check the connection between the vacuum hose and the booster itself
Old 11-29-2008, 08:11 PM
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Really? I didn't know the brake booster could affect it that much. I'll check it out for sure ASAP! Kinda busy lately and it just started snowing the past couple days so the car isnt being driven anyway. Might get a chance to look at it tomorrow.



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