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Brake pedal juddering under foot at low speed braking?

Discussion in 'Cavalier, Calibra, Vectra, Signum, Sintra & Insignia owners forum' started by GSi-R, Jun 10, 2005.

  1. propwash

    propwash Well-Known Member

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    Remove fuse 14. If it stops doing the vibration thing then it's the ABS. Removing the fuse should put the ABS lamp on as well, so this will show you if the light is working or not!
     
  2. GSi-R

    GSi-R Well-Known Member

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    Will try that matey. I suspect the ABS warning bulb has blown as i havent ever seen it on, not even with the ignition test lights circut on the dash when ignition is turned on.

    Micky
     
  3. Andy K

    Andy K Cav3 God!

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    If you think it is the ABS, remove the fuse and see if it still happens,

    otherwise I would have thought it was the discs at fault
     
  4. GSi-R

    GSi-R Well-Known Member

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    Will remove fuse 14 now, go for a drive, and report back.;)

    Thanks all.(y)
     
  5. Colin1

    Colin1 New Member

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    Are the discs on flush Micky?
    If there's foreign bodies/crud/build up of copperlube behind them, they won't be parallel with the braking action - this can emulate warped disc behaviour
     
  6. GSi-R

    GSi-R Well-Known Member

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    Just got back after a short drive :oops: 20 miles:ROFLMAO: with fuse 14 pulled.

    Result=

    No juddering/pulsating under brake pedal, so turns out to be a ABS issue, well at least i now know for sure.!

    Thanks all

    Discs are seated fine mate(y) Thanks anyway dude.:D
     
  7. grimey121uk

    grimey121uk Banned

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    warped discs, mine are fukked on modeo now lol, i mean they are all of 4 months old what else ya expect
     
  8. GSi-R

    GSi-R Well-Known Member

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    It turns out its ABS related mate, more than likely a dodgy sensor.;)
     
  9. mig_v6

    mig_v6 VxON Club Member VxON Club Member

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    i had a similar problem but i knew the cause....

    [​IMG]

    [​IMG]

    [​IMG]

    all sorted now tho
     
  10. propwash

    propwash Well-Known Member

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    Micky,

    Had similar on 5 different cars.

    On 3 of them the pedal felt like the abs was kicking in - a marked high frequency vibration and associated lack of braking effort - nearly stuffed one into the rear of a car at about 10mph! Those turned out to be the toothed ring on the CV joint that was broken.

    The other 2 had a wobble that could be felt through the steering - almost like the wheel balance was out. That turned out to be a dodgy sensor - although it took new lower arms, track rod ends, shocks and about 5 balances to convince me it was the bloody abs!

    bung a new bulb in and see if a fault is logged M8 and then take it from there.
     

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