[s-cars] strange antilock behavior

[Keith Maddock]

Scott,

When your pads squeal, this is due to vibration that isn't being damped.  Sometimes this vibration can also cause noise in the wheel speed sensors, which can confuse ABS, especially at low speeds.

I suggest both Scott and Dave perform what Pizzo suggests, and make sure your ABS sensors are firmly seated.  If one feels loose, perhaps some VERY light application of a sticky spray might help hold it in better.

Cheers,
Keith
93 S4 mit Big Reds
95 968CS mit" little Blacks" front/rear but M030  "medium blacks" sitting in office waiting for matching hubs :)


Keith Maddock, TRW Automotive,  Koblenz, Germany
Slip Control Systems, Systems Design, Traction Control
+49 (0)261/ 895 2474    -   -   keith.maddock at trw.com


>>> Scott Munger <mungerts at yahoo.com> 16:58:13 28.08.2003 >>>
Joe, et al,
This started happening with my car after the Big
Blacks went on and only at the final few feet of a
light stop when the pads/(or something) were
squealing.
Does the squeal confuse the sensors?  Or would any
type of ABS action indicate a sensor problem?

--Scott

> --
> [ Picked text/plain from multipart/alternative ]
> Wondering if anyone has run into this before...
> When stopping, regardless of
> how hard the stop, just as you are nearly stopped, a
> light pulsing from the
> ABS can be felt.  The pedal then drops a bit.  As
> the stop is completed, the
> ABS stops pulsing, and the pedal comes back up.
> This has just started during
> the past week or so.  It began during a 2k+ mile
> trip.  Otherwise, I have
> changed nothing recently.
> As always... any input appreciated.
> Dave in CO
>
>
> Your ABS sensors are either (a) loose, (b) broken or
> (c) the wiring for them has been damaged.
>
> Pull the wheels off and make sure it's pushed
> securely
> into the spindle.
>
> Send beer to:
>
> Joseph Pizzimenti
> Harrison, NY
>
>

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