[V8] theoretical vacuum questions from the center of my mind.....

[Allan Vega]

What Ed said, they are all separate.
-Allan

Sent from my iPhone

On Jan 20, 2012, at 8:25 PM, "Ed Kellock" <ed.kellock at gmail.com> wrote:

> I'm fairly certain that you're dealing with 3 separate vacuum systems.  On
> all my cars (pre-C4), these three systems are entirely separate from
> anything else.  The CC has its own pump, the door locks have their own, and
> the climate control system operates off of engine vacuum. 
> 
> Sorry,
> 
> Ed
> 
> 
> 
> -----Original Message-----
> From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf Of
> Roger M. Woodbury
> Sent: Friday, January 20, 2012 3:56 PM
> To: v8 at audifans.com
> Subject: [V8] theoretical vacuum questions from the center of my mind.....
> 
> 
> I have a theoretical question about vacuum systems in these cars.  I am
> specifically working my way around a vacuum failure in my wife's 100CS, but
> I am quite certain that most Audi vacuum systems work in similar fashion.  I
> have NEVER had a vacuum failure in any of the cars which I have owned, but
> it appears that the 100CS is having a serious vaccum meltdown.  Here's what
> is happening.
> 
> Late sping, 2011:  cruise control turned off.  It just let go, and when
> reset, reset for a while and then disengaged again.  When I tried to reset
> it, no result.
> 
> At some point, and perhaps more or less the same time, we began to
> experience some unlocking/locking difficulties with the right side doors in
> the same car.  Some days the doors would lock and some days they would not.
> Some days they would not unlock with the key in the driver's door, and some
> days they would. Eventually, neither front nor rear right side door will
> lock or unloock properly with the key from the driver's side door.  nor will
> the key unlock both front and rear doors on the right side.  The left side
> appears uninvolved and both front and rear left side doors will unlock with
> the key from the driver's side.
> 
> The recirculating valve is not working properly if at all, and when it is
> cold and damp, the interior surfaces of the window fog badly.  I believe and
> have been told on this list that this is a vacuum operated flappy valve.  
> 
> Now, my questiion:  is there one pump that will provide vacuum to all of
> these points on this car?  Or are there multiple pumps?  It seems likely
> that the doors and the recirculating flap might be operated by the same
> pump/vacuum source.  I do not have a manual, and perhaps I should, but for
> now, I'll just post the question.
> 
> Replacement pumps are crazy expensive or crazy cheap and plentiful for all
> sorts of things on this car.  Any comments will be gratefully received.
> 
> Roger
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