[s-cars] Pump, Bomb, or servo, oh my!

[Mike Platt]

Hi Fred,

The bomb is about a year old. I have a firm pedal when
car sits, which leads me to believe it is the bomb. I
refuse to spend The $200 unless I am sure thats all.
This car has had two bombs, and a hydraulic pump in 2
1/2 years. This would make bomb #3.

Previous owner had replaced 2 pumps under factory
warranty and a master cylinder before 84k.

Something is amiss.

Like I said, car may need a real bomb...or roll over
as Ellijah mentioned worked for him:) 

Mike
--- Fred Munro <munrof at sympatico.ca> wrote:
> Matt;
> 
> Do the "bomb test". Your symptoms are indicative of
> no stored pressure in
> the bomb. The pulsations you feel are the pressure
> pulses from the pump.
> Hard braking requires more fluid flow than is
> provided by the pump directly
> (hence the stored fluid in the bomb) and you run out
> of brake boost. These
> cars just don't stop without brake boost as you
> probably have noted by this
> point.
> 
> Don't drive it until it is fixed, manual braking
> blows chunks (and loosens
> bowels) on the turbo Audis!
> 
> Did you disconnect the hydraulic pump when you did
> the t-belt by any chance?
> 
> HTH
> 
> Fred Munro
> '94 S4
> 
> 
> -----Original Message-----
> From: s-car-list-bounces at audifans.com
> [mailto:s-car-list-bounces at audifans.com]On Behalf Of
> Mike Platt
> Sent: June 7, 2004 10:07 AM
> To: Scar
> Subject: [s-cars] Pump, Bomb, or servo, oh my!
> 
> 
> It seems the wife's S6 avant is possessed and
> continues to plague me whenever I drive her. I just
> finished doing a major timing belt service, fixed
> oil
> leak, and rebuilt front end. A nice gesture for the
> old girl which comes back to bite me now.
> 
> Thursday the brake light comes on and the power
> brakes
> pulsate. If I press the pedal lightly I have plenty
> of
> braking power, with pulsation. If I need to quickly
> hit brakes, like for a panic stop, the pedal is firm
> and brakes seem to be in delayed reaction and in
> manual mode(quite scary). The power steering seems
> unaffected and works fine.
> 
> Where to go look I must ask? Bomb is less than a
> year
> old, hydraulic pump is about 2.5 years old. Fluid
> was
> flushed and updated to 11s when pump replaced. There
> are no leaks anywhere.
> 
> Thanks anyone.
> 
> I have been considering car needs a real bomb put in
> it now but the car may "Christine" me.
> 
> 
> 
> 
> 
> 
> =====
> Mike P
> 95.5 S6 avant
> 86 Shelby GLHS #134
> 75 911 Carrera targa
> 74 914 2.0
> 99 Ducati ST4
> 
> 
> 
> 
> 
> 
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