Re: [No EFI] ABS Help Needed

["Programmer" <nwester@eidnet.org>]

Pretty tough to sell preventative maintenance in anything <g>...

Lyndon.
-----Original Message-----
From: nacelp <nacelp@bright.net>
To: gmecm@diy-efi.org <gmecm@diy-efi.org>
Date: April 28, 2000 10:28 AM
Subject: Re: [No EFI] ABS Help Needed


>
>
>> Guess what brake squeel does ?? Sets up a resonance frequency on
>> the rotor that the wheel sensor can actually pick up.
>
>Does this mean the speed sensors are reluctor types?.
>Whoda thought.
>
>The ABS computer then
>> gets false signals and you can get false triggering. You can even get
>false
>> triggering on a rough road...and yes--contaminated fluid is a real
problem
>> with ABS...nobody likes to flush anymore <G>.
>
>Seems like, why flush, sell more $$ work later.   Seems like the world is
>getting less and less mechanic friendly
>Grumpy
>
>
>> Lyndon.
>> -----Original Message-----
>> From: Mike Turner/ENGR/HQ/KEMET/US <MikeTurner@kemet.com>
>> To: gmecm@diy-efi.org <gmecm@diy-efi.org>
>> Date: April 28, 2000 9:01 AM
>> Subject: [No EFI] ABS Help Needed
>>
>>
>> >Where might one find any information on troubleshooting, communicating
>> >with, replacing, etc. an ABS unit for a late 86 (ie 87) Corvette?
>> >
>> >Ours has developed a couple symptoms. The first occurs just after mild
>> >brake application. On release of the pedal, the abs kicks in and the
>pedal
>> >starts vibrating for a short period. The other symptom is the ABS light
>> >coming on sometimes after this event but not always. ABS action during
>and
>> >after hard braking looks and feels normal.
>> >
>> >I have considered a complete brake line flush including the lines to the
>> >abs unit. Removal and replacement of the abs unit looks non-trivial to
my
>> >untrained eye. My local vette experts indicate fluid contamination
should
>> >not cause this symptom. A sticking pad or caliper could fool the abs (ok
>> >the wheel may actually be locked up and abs is just doing its job but
>seat
>> >of the pants says no wheels are locked since car is slowly rolling).
>Ditto
>> >a flaky wheel sensor.
>> >
>> >Additional info:
>> >Calipers replaced a few months ago. Symptoms did not immediately appear
>> >after replacement.
>> >Brake pads are hawk autocrossers which squeal impressively.
>> >Rotors are stock.
>> >
>>
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