[Biturbos4] Startup Noise 2002 S4

Fri Apr 4 22:53:07 PDT 2008

Since it's a Tip - It's DEFINITELY your secondary air pump. Yes, it does eventually throw a CEL. How do I know? The EXACT same sound occurred on my Y2K S4 Tip and my mechanic traced it to the secondary air pump - it's part of the EVAP system on a Tip - S4s with manual transmissions don't have this system.  I replaced the pump about 3 months ago - it cost me $475 for the pump and my mechanic charged me next to nothing for the install - he felt sorry for me. I have a stage 3 tip that visits his shop every other month for something! 

As far as the argument with your wife - hate to say it - she's more RIGHT than WRONG when it comes to the S4 being a maintenance whore! Owning an S4 is like having a GREEDY mistress - you just spend the $$$ and hardly get any love (driving time) - because there is ALWAYS something that needs to be replaced. The 2.7T engine is rock solid - but the other components on the car are junk!  I have too much invested in my S4 to just dump it.

----- Original Message ----
From: Al Adler <adlere at attglobal.net>
To: "Long, Scott G A1C USAF AFMC 88 SFS/S4W" <Scott.Long2 at WPAFB.AF.MIL>
Cc: biturbos4 at audifans.com
Sent: Friday, April 4, 2008 3:25:53 PM
Subject: Re: [Biturbos4] Startup Noise 2002 S4

Sounds like the resistor is the way to go. I remember that guy with the 
supercharged A4 - I used to have an A4 and after seeing what he went 
through I was glad I swapped into the S4 instead.

Good luck,
Al

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