IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Brake Pedal gets HARD (booster leak?)

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Old 04-05-11, 07:27 PM
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Tarmac04
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Default Brake Pedal gets HARD (booster leak?)

Hey guys,

If I don't start the car for two days or more, when I'm gonna use it again and push the brake pedal to start the car, it is really hard (as if you pumped the pedal with the car off until it got hard). Like if it lost the vacuum, I'm thinking it could be a very small leak in the booster.

Has someone else experienced this? Did a search but didn't find anything.

Thanks in advanced.
Old 04-05-11, 07:30 PM
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VNN326
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its normal when you pump it with the car off and it gets hard. NO HOMO...... and when you start it it gets soft and sinks down.
Old 04-05-11, 07:34 PM
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Tarmac04
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Yeah I know it's normal that it gets hard when you pump it with the car off, but that is not the case.

The pedal gets hard by itself (without me pumping it) if I don't start the cars for a couple of days. It gets soft again once I start the car.

Thanks though
Old 04-05-11, 07:35 PM
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edgeucated
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I think he means that it gets hard without him having to pump it...no homo lol
Old 04-05-11, 07:51 PM
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Sango
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????????

You don't even need to really pump it, just press the pedal enough for green light to go off on the start button and fire away! I left my car for two days if I don't go out on the weekend and stay home - never paid attention to this kind of issue or notice anything out of the ordinary.

Last edited by Sango; 04-05-11 at 07:54 PM.
Old 04-05-11, 08:40 PM
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chi123
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I happened to me during the winter time. Every time I would press the brake pedal to push the Start button, it would barely have enough free-play for the button to turn green. My auto tech teacher and I both agreed it was just a pressure loss from a leak in the piston boots or lining. It eventually went away when the weather got better. You can go get a free brake inspection at Pepboys, they actually are able to find out the problem.
Old 04-05-11, 10:00 PM
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slidingIS
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it would go to to the floor if it was a booster leak
Old 04-05-11, 10:48 PM
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Originally Posted by BiggVinh
its normal when you pump it with the car off and it gets hard. NO HOMO...... and when you start it it gets soft and sinks down.
+1. It sounds normal. Step on the gas pedal to start the car and it will have greater resistance than the moment you push the start button and it starts up.
Old 04-05-11, 11:13 PM
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GiantsFan
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LOL ... this thread was an an entertaining read ...

... If you are able to press the brake and get a green light ... I don't see too much of a problem..
Old 04-06-11, 01:00 AM
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SGMIS3
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what he means is that he doesnt need to pump it to get hard. I can get hard without pumping it as well.
Old 04-06-11, 01:12 AM
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abounly
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whatta homo thread! haha

Maybe someone went into your car and spammed your brakes?

Has it effected your braking at all?
Old 04-06-11, 09:14 PM
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Tarmac04
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no effect on braking, just having to push hard on the pedal to get the green light to come on and start the car.
Old 04-06-11, 09:20 PM
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Tarmac04
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Originally Posted by chi123
I happened to me during the winter time. Every time I would press the brake pedal to push the Start button, it would barely have enough free-play for the button to turn green. My auto tech teacher and I both agreed it was just a pressure loss from a leak in the piston boots or lining. It eventually went away when the weather got better. You can go get a free brake inspection at Pepboys, they actually are able to find out the problem.
Yeap, this is exactly what happens to me, only that it happens when I don't start the car for more than two days. Since I use it daily, it normally doesn't happen. But if I don't use it on the weekend, on Monday the pedal is hard. Most likely its is as you said, a lost of pressure (but a small one in my case).

Just wanted to check if this had happen to someone else, but I see it isn't normal. My warranty will expire in a couple of months, maybe I'll have it checked before it does.

Thank you all for the replies
Old 04-06-11, 09:58 PM
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Micaiah
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Originally Posted by SGMIS3
what he means is that he doesnt need to pump it to get hard. I can get hard without pumping it as well.

Oh my.
Old 04-07-11, 06:04 AM
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That's weird that it gets hard without needing to pump it. Normally the only way it gets hard is to pump it a few times at the very minimum. Sounds like you have a defect of some sort.


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