5k tq ABS xshooting

[Efraim]

I have same problem with my 5KTQ for a while. ABS locking up about two feet
before the complete stop. Quite embarrassing when I carry passengers, I have
to apologize for Audi misbehaving while still being the best car around.
Sometimes I just turn it off to spare a need for explanation. When I asked
my mechanic to fix it, he was unexcited and tried to talk me out of it. Is
it fixable however expensive and difficult, or do I have to live with it?
Thanks,
Efraim
'88 5KCDTQ  324K km (201K mi) , 1.8 Bar
'90 90 100K km (62K mi)
Vancouver, Canada


----- Original Message -----
From: <isham-research.freeserve.co.uk at pop.pol.net.uk>;
<quk at isham-research.freeserve.co.uk>
To: <josh at spiny.com>; <quattro at audifans.com>
Sent: November 27, 2000 12:00 AM
Subject: Re: 5k tq ABS xshooting


>
> > If that doesn't do it, then looking at the sensor waveform with a
> > scope could help you find a missing tooth, or low amplitude (compared
> > to one of the rears, which is presumably working okay. The main cause
> > of low amplitude is too large a sensor gap.
>
> Amplitude is affected by the sensor gap, the tooth profile and speed
> of hub rotation.  ABS problems generally show up first as a stutter at
> very low speeds - this is because the amplitude has fallen low enough
> at low speeds for the computer to think the wheel has stopped.
>
> I've had three cases - all in cars that have been used extensively on
> the east coast of Scotland - where no amount of effort would restore
> ABS function after the hub was pulled.  The teeth are no longer
> square and straight - they come to a point like gear teeth and they're
> concave along the axis of the hub.
>
> --
>  Phil Payne
>  UK Audi quattro Owners Club
>  http://www.isham-research.freeserve.co.uk/quattro
>  Phone +44 7785 302803   Fax: +44 7785 309674
>