proportional valve: how important to have working one?

[Brian Devlin]

I didn't know that quattros got the active proportioning valve
thingies. Wouldn't the 89's have ABS anyway? So wouldn't we be taking
about the proportioning valve situated under the master cylinder? The
one you're not supposed to be adjusting anyway? Or am I just confused?

And what functional test/drivability issue are we really talking about?

-Brian
-86 5ktq

>--
>Proportioning valve is supposed to adjust rear braking for load, I
>believe.  Don't know what that adjustment would be, though.  If your rotors
>are remaining rust-free, your rear brakes are working, probably at least
>for minimum loading of the car.
>
>
>At 05:31 PM 02/26/2002 -0500, Konstantin Bogach wrote:
>
>>Hi listers.
>>
>>Proportional valves on both my cars do not work.  They are frozen.  How
>>significantly it affects braking?  Can it freeze in such position that
>>reduce overall braking power?
>>
>>Thank you.
>>
>>Konstantin Bogach
>>200tq '89
>>200tqa '89
>--