GTI6 brake master cyclinder question.
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Thread: GTI6 brake master cyclinder question.

  1. #1
    Fellow Frogger! dhaw's Avatar
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    Default GTI6 brake master cylinder question.

    The six is still having an intermittent problem. While driving in normal traffic or motorway the car will slow and not respond to accelerator in normal way. It feels for all the world like the handbrake has been pulled on. Clutch in and the car will rev normally. I suspect the brakes because it will clear after a good hard stamp on the brake pedal. Although this morning that did not seem to work but after half a km it cleared by itself. I felt a significant freeing of the retardation and the car began to move normally. My thoughts were that a brake piston was jamming on and then releasing. But then I realised it could be the master cylinder about which I know zilch. Any clues from members about what might be happening? Its not a fuel or fool issue!

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    Last edited by dhaw; 30th September 2016 at 03:34 PM.

  2. #2
    1000+ Posts BIGRR's Avatar
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    Is there a return spring on the brake pedal?

    Get down inside and giggle around with the pedal.


    May be time for that Coupe.
    Present fleet:-
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    "Be reasonable do it my way!"


  3. #3
    Fellow Frogger! dhaw's Avatar
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    Quote Originally Posted by BIGRR View Post

    Get down inside and giggle around with the pedal.
    You DIY types are your tech speak.. giggle? I can tell it some of my dad jokes ... I'll go bum up for your Robert.. just as soon as I can.. good thought!

  4. #4
    1000+ Posts BIGRR's Avatar
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    If giggling does not work, you could try jiggling.

    Also check (under the bonnet) that the two nuts securing the brake master cylinder to the booster are not loose.
    dhaw likes this.
    Present fleet:-
    Peugeot 93' 205 Gti 16v
    Peugeot 73' 504 Ti from new
    Peugeot 08' 407 Hdi Coupe from new

    Previous fleet:-
    Peugeot 95' 605 Sv
    Peugeot 92' 205 Gti
    Renault 72' 16TS from new
    Renault 69' 10
    Renault 71' 10s
    Renault 68' 10 from new

    "Be reasonable do it my way!"


  5. #5
    Fellow Frogger! dhaw's Avatar
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    Quote Originally Posted by BIGRR View Post
    If giggling does not work, you could try jiggling.

    Also check (under the bonnet) that the two nuts securing the brake master cylinder to the booster are not loose.
    My nuts are tight and I jiggled... there does not seem to be a spring that I can feel on the Six pedal but I'll go and google.

  6. #6
    1000+ Posts N5GTi6's Avatar
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    Quote Originally Posted by dhaw View Post
    My nuts are tight and I jiggled... there does not seem to be a spring that I can feel on the Six pedal but I'll go and google.
    Giggle ?? I thought everyone Googled these days to fix their cars.........

    Cheers

    Justin
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  7. #7
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    Check that the rear brake handbrake mechanism is returning. Incorrect adjustment, damaged cables and/or sticking mechanism can allow rear brakes to stick on with symptoms almost exactly as you've described.

    Sent from my D5833 using Tapatalk
    Current: 205 GTI Mi16
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  8. #8
    1000+ Posts driven's Avatar
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    Had same problem with my old R17.
    Obscure cause, buildup of grunge in brake lines/hoses.

    Ensure all your lines are clean

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