mazdapete
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« on: August 12, 2009, 08:38:11 pm » |
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my 08 t2 has a nasty nack of brake release over bumps or manholes. I first noticed the problem braking when coming up to a pedestrian crossing. I must had driven over a slightly sunken drain cover. The brakes actually released even with my foot on the pedal for a good few feet before regaining grip. This was concerning mainly for the pedestrian. I just thought it was a one off, but have had the same problem a few times now. its about to go in for 24K service, so i hope it gets sorted for me and other road users, seriously i move on a good 5 to 10 metres with no brakes, aahhhh!!!  so anyone else witnessed this problem or similar? what did you get done about it, Help please  |
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Si
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« Reply #1 on: August 12, 2009, 09:10:13 pm » |
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This sounds like something that I have had a couple of times in my 2, once on an uneven manhole and once on a bump/pothole. When I experienced similar in my previous car, a Corsa, I was told that it was the ABS kicking in.
With the Corsa it also happened when braking where there was a water leak, so a slippery surface - and both cars have done it on one particular bump near the bottom of a hill! Most people assume that ABS means the car will stop quicker but that isn't necessarily the case, but it will come to a stop with more driver control and less chance of a skid.
I am assuming that the bump momentarily confuses the ABS system into thinking a wheel has locked up, so it releases the brakes and then reapplies them. The Corsa also made a noise and you could feel a juddering on the pedal as it cut in. In each case I have been doing less than 30 mph.
In view of the diagnosis on the Corsa, I haven't taken the matter any further with the 2.
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« Last Edit: August 12, 2009, 09:13:14 pm by Si »
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angelos
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« Reply #2 on: August 13, 2009, 06:21:13 pm » |
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I experience such kick in by the brakes when going over bumps! You feel like the car kicks a bit front!
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cuke2u
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« Reply #3 on: August 13, 2009, 07:45:31 pm » |
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I experience such kick in by the brakes when going over bumps! You feel like the car kicks a bit front!
Hi, I think you are describing a suspension trait not a braking one... Chris |
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Proud owner/driver of a 2010 Mazda2 Sport in Icy Blue and 2011 Mk3 Focus TitaniumX in Candy Red :-)
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angelos
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« Reply #4 on: August 13, 2009, 09:07:32 pm » |
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I don't know how to describe it properly it just feels like the car kicks to recover the traction lost over a bump! Not sure how to say it ....
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cuke2u
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« Reply #5 on: August 14, 2009, 08:38:01 pm » |
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I don't know how to describe it properly it just feels like the car kicks to recover the traction lost over a bump! Not sure how to say it ....
Hi, if it is over wet drain covers then it'll be monentarily loss of traction, over bumps it could be the TC/ESP kicking in to compensate for loss of traction.. Chris |
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jb66
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« Reply #6 on: August 15, 2009, 03:32:11 pm » |
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my bmw does this sometimes, its abs unlocking the wheels
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angelos
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« Reply #7 on: August 15, 2009, 05:32:33 pm » |
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Thanks for the info , it's on dry surface and I don't have the TC/ESP from the sport  So it must be ABS I guess? |
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Smthers
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« Reply #8 on: May 15, 2010, 09:31:25 am » |
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I've had this happen to me a couple of time, and it isn't funny if it's on the approach to a busy junction / roundabout.
On both occasions I was traveling downhill towards islands on national speed limit roads. If there's a sunken manhole cover on the approach to the island this can unsettle the ABS. The closer the manhole cover is to the island the scarier it is - for both the driver and the passenger. On both occasions I honestly didn't think we were going to stop!
I know this thread is getting old now, but has anyone else had any experience of this lately?
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Si
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« Reply #9 on: May 15, 2010, 09:57:39 am » |
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I know this thread is getting old now, but has anyone else had any experience of this lately?
The places where mine did this are places I drive through quite often, so I have modified the way I drive (where and when I brake etc) to stop it from happening! Having said that, I am sure it will catch me out again now. No matter how many times it has done it and how familar the location is, it is very unnerving. |
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« Last Edit: May 15, 2010, 09:59:14 am by Si »
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MSBurger065
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« Reply #10 on: May 17, 2010, 10:39:45 am » |
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HAHA it's way better than a E90 BMW does it, it happens if there is uneven tar surface especially if u brake hard.
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Matt
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« Reply #11 on: May 21, 2010, 02:47:18 pm » |
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Ah, this is what happens to be sometimes then!
It always happens when I am coming into a crossing or breaking and if there are small bumps.
It feels like the brakes just stop working for 0.3 seconds and I get the "argh im going to crash feeling" and then all returns to normal again.
Yes I get that too, only very seldomly. And then after it's happened I'm not sure if I imagined the whole thing because the brakes work fine again.
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