[Biturbos4] Startup Noise 2002 S4

[Al Adler]

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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>> Biturbos4 at www.audifans.com
>> http://www.audifans.com/mailman/listinfo/biturbos4
>>   
>>     
>
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