[20v] Need Hydraulic Pressure Accumulator for Coupe Q

[Peter Schulz]

Ben :

Also clean the screen on the pump banjo bolt.
You should consider flushing the system.

-Peter


On Jan 20, 2011, at 8:40 AM, Ben Swann wrote:

> I believe I had/have a blockage in the screen going into the check valve.  Indications
> were that the pump was going south, I swapped out with known good used pump and had some
> improvement.   Got a lot of crappy fluid out - had metal like particles in suspension.
> 
> I now have some assist with engine running.   Still the brake light goes on with hard
> braking and assist not 100% but OK for now.
> 
> Pedal now goes hard after shutoff, so  looks like the bomb is depleted too.  
> 
> I think the problem will clear after bomb is replaced and new fluid run through the
> system.
> 
> Ben
> 
>  _____  
> 
> From: Tony Hoffman [mailto:auditony at gmail.com] 
> Sent: Wednesday, January 19, 2011 8:50 PM
> To: hah at alumni.rice.edu
> Cc: Ben Swann; quattro at audifans.com; 20v at audifans.com; 200q20v at audifans.com
> Subject: Re: Need Hydraulic Pressure Accumulator for Coupe Q
> 
> 
> That sounds like servo/pump/blocked line failure to me as well. My V8Q had a dead bomb
> (one pump after shutdown, hard pedal) yet always had perfect pedal while running. If I
> pumped the pedal a couple of times in quick succession I could get a hard pedal also,
> but it would then go back to normal after a second or so of running. The bomb should
> only be for after shutdown, if it's hard while running there are definately other
> problems.
> Tony
> 
> 
> On Wed, Jan 19, 2011 at 12:57 PM, Henry A Harper III <hah at alumni.rice.edu> wrote:
> 
> 
> 
> This sounds more like a brake servo failure (servo check valve?) to me. Even
> with a dead bomb which my 200q20v had for several years until I got around
> to replacing it, there is (or should be) enough pressure from the pump alone
> to supply assistance in normal easy braking - I would have to stomp the
> pedal hard to get the brake warning light to come on with the car running.
> Not that you don't also have a dead bomb, but what you describe were not my
> dead-bomb symptoms; when I replaced the bomb all was well with no brake
> warning light and many pedal stomps.
> 
> Henry Harper
> 
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-Peter Schulz
Chelmsford Ma, USA
http://www.naaclub.org/

1995.5 S6 Avant Emerald/Ecru
1995.5 S6 Avant Silver/Platinum
1991 90Q 20v Q Red
1991 90Q 20v Indigo
1991 CQ silver  (eS2 recipient)