[Biturbos4] Startup Noise 2002 S4

Fri Apr 4 12:17:45 PDT 2008

http://forums.audiworld.com/30vv6/msgs/2819.phtml

If I could leave the pump on but just put a resistor into the connector
to fool the ECU than I'd be happy.  I don't need the pump and no one I
know does cold start emissions tests anyways.

Supposedly there is also a fuse.  I could pull it.  I just can't have
the CEL come on because my wife drives the car and she wants to sell it
anyways.  With a CEL there is another argument about having an expensive
repair and we should sell it etc...  I could give a rats arse about the
pump working or not as long as I can keep the engine light off.

Scott G. Long

  _____  

From: Al Adler [mailto:adlere at attglobal.net] 
Sent: Friday, April 04, 2008 2:52 PM
To: Long, Scott G A1C USAF AFMC 88 SFS/S4W
Cc: biturbos4 at audifans.com
Subject: Re: [Biturbos4] Startup Noise 2002 S4

Ok, I went out to the garage and took a look at my 00 S4 since its been
a while since I looked for the pump. You'll find the air pump  a few
inches in front of the firewall on top of the engine on the drivers side
next to the Y pipe. The part that sticks up is the motor and is about
the size of a smallish can. It has a 2 or 3 wire connector on it that
you could pull off and see if the noise stops or if you throw a code.
I'm not sure that you'll trip the light but I seem to remember a
discussion on the Audiworld website that said it did. It would make
sense as its part of the emissions system and indicating emissions
related problems is a primary function of the light. I'm not sure of the
official name of the pump but given Audi's consistency it probably is
called several different things depending on where you look. If you call
a dealer or maybe Clair parts they'd probably be able to give you a
price. Alternately you might be able to find more info if you search the
archives on Audiworld.com.

TTFN,
Al

Long, Scott G A1C USAF AFMC 88 SFS/S4W wrote: 

Are you sure it will set a check engine light if it doesn't run?  Is

there any way to disable this pump through tuning the computer?  It is

probably the pump because today I was standing by the left front wheel

and it didn't necessarily sound like it was coming from the engine, more

like from the middle of the car under the drivers side door position.

What is the technical name for it?  I've googled Audi tiptronic air pump

and tiptronic emissions pump and found nothing.  I'd like to price one

out and see how to replace.

Scott G. Long

-----Original Message-----

From: biturbos4-bounces at diablo.audifans.com

[mailto:biturbos4-bounces at diablo.audifans.com] On Behalf Of Al Adler

Sent: Friday, April 04, 2008 11:00 AM

To: Long, Scott G A1C USAF AFMC 88 SFS/S4W

Cc: biturbos4 at audifans.com

Subject: Re: [Biturbos4] Startup Noise 2002 S4

If you have a tiptronic its probably the air pump that you're hearing. 

Manual's don't have them. It only runs for a short time after a cold

start.

TTFN,

Al

Long, Scott G A1C USAF AFMC 88 SFS/S4W wrote:

When I start my car after it's been sitting for a while (morning or 

after work) it makes a high pitched whirring/grinding sound from the 

left side of the engine for about a minute, after that it stops. It 

runs and drives fine. If I rev the motor while it's making this sound,

the tone does not change at all, it stays constant. Because it stays 

constant I don't think it's turbo related.

Any ideas what this may be?

Scott G. Long

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