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Author Topic: brake pedal jumps down  (Read 1552 times)

Offline bigman_10

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brake pedal jumps down
« on: 20 May 2008, 14:20 »
Right guys i have a bit of a problem with the brake pedal, when braking you push the pedal down and after about 1-2 inches of travel the pedal seems to drop a fraction. Its fine apart from this, as in its normal apart from the fact after about 1-2 inches it drops. it doesnt go to tjhe floor or anything daft. Its constantly increases in stiffness. It feels like its a mechanical slip asthoogh the bushes are worn :undecided:? i dont know though? i tried to have a look but i dont really know what the problem could be any ideas?

Chris
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Offline russ-vdub

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Re: brake pedal jumps down
« Reply #1 on: 20 May 2008, 16:05 »
That is wear a brake hose is gone. Basically when you apply the pressure to the brakes, it pushes out on all hoses. So where you are experiencing a drop in the pedal, is most likely where a hose is ballooning so to speak. Get your car jacked up, wheels off, someone pressing the brake, and then check all hoses and you should find the faulty hose :)

Hope that helps
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Offline bigman_10

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Re: brake pedal jumps down
« Reply #2 on: 20 May 2008, 16:31 »
nice one! it felt like the pedal box but yeah it makes sense i'll get it up and have a look!  :wink:
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Offline russ-vdub

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Re: brake pedal jumps down
« Reply #3 on: 20 May 2008, 17:09 »
No probs :)
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Offline bigman_10

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Re: brake pedal jumps down
« Reply #4 on: 20 May 2008, 21:16 »
i've just checked the hoses and they're fine! but it didn't seem to drop when it was at standstill it jsut seems to do it after i've been driving around. now i'm wonmdering weather it has anthing to do with the pedal box? Could it e that the bush just slips? I'l have a proper look at the weekend but i'm not certain what it could be? any more ideas?
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Offline Jay

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Re: brake pedal jumps down
« Reply #5 on: 20 May 2008, 21:30 »
How's the braking when the pedal drops? Do you loose stopping power?
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Passat B5.5 2.3 V5 170, with all the extras.

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Quote from: PenguinGTI on 11 May 2012, 17:49
But for the purest engine experience, displacement has no replacement. All other methods are simply attempts to artificially recreate the benefits of displacement.

Offline bigman_10

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Re: brake pedal jumps down
« Reply #6 on: 20 May 2008, 23:35 »
no you dont loose stopping power (i dont think, the car doesn't jerk or anything) so its not a dangerous problem its just well annoying!
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Offline russ-vdub

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Re: brake pedal jumps down
« Reply #7 on: 21 May 2008, 09:53 »
That sounds like the brake fluid could do with a change. I take it you had the engine running when you did this test yeh?
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Offline bigman_10

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Re: brake pedal jumps down
« Reply #8 on: 21 May 2008, 18:00 »
yeah i was running the engine it when i tested it and the servo works fine (thepedal dropped when i turned it on so thats ok i think) it seems to do it when your braking for a bend? any ideas?
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Offline Jay

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Re: brake pedal jumps down
« Reply #9 on: 21 May 2008, 22:50 »
Does it matter if it is a left bend or a right bend?
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Quote from: PenguinGTI on 11 May 2012, 17:49
But for the purest engine experience, displacement has no replacement. All other methods are simply attempts to artificially recreate the benefits of displacement.
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