A4 ABS help- last call or car gets crushed.

[Bob]

Thanks everyone who helped out with this. It came back from the shop 
today, a few bills lighter and still no working ABS. they say they 
tested everything too. argh.  With the advice of the list though, I will 
attack it myself starting with the scope on the sensors figuring out the 
wave forms etc. Ill keep you posted.

Brett Dikeman wrote:

> At 11:40 AM -0500 12/28/04, Bob wrote:
>
>> Im about ready to crush this POS unless someone has any greaet 
>> suggestions.  its a 98 2.8 with about 80K on it.  This past summer 
>> the ABS light came on so they took off all the sensors and cleaned 
>> the crap off them
>
>
> Do they use ablative caps for spacing to the hub like the type44?
>
>> . No help. VAG-COM said "unable to communicate with ABS controller" 
>> Ok its shot, fine.  Got the upgraded one and installed it, bled the 
>> system etc. Brakes function but the ABS now kicks in at the slightest 
>> thing. Even on flat dry surfaces.
>
>
> At low speeds?  Classic sign of reduced signal to noise ratio on the 
> sensors.  Accumulated filings will do it, incorrect spacing, rusted 
> teeth on the hubs, serious problems with the hub (like a totally 
> trashed wheel bearing) etc.
>
>>  It is most annoying. I wound up unplugging the ABS controller again. 
>> the beep and light is less annoying.  VAG COM says it can now 
>> communicate with it and isnt showing any issues.
>>
>> Any suggestions appreciated, or come pick up a free A4!
>
>
> I smell track car.  Where do I sign? :-)
>
> Brett