Re: Boost gauge problems

["Dave Aukerman" <aukdav@wcoil.com>]

Very true.  The Autometer gauge in my car does not rest at zero (0), but
rather a hair over.  Always thought it was a quirk of the guage but after
reading Roberts' explaination it makes since now.

Dave

-----Original Message-----
From: Robert Myers <rmyers@inetone.net>
To: Fred Munro <munrof@isys.ca>; TM <mizutanit@mindspring.com>; Quattro List
<quattro@audifans.com>
Date: Saturday, October 30, 1999 7:48 PM
Subject: Re: Boost gauge problems


>A word of caution here.  The manifold pressure of the engine while not
>running will be some fairly close approximation of 1 atmosphere or 1 bar
>(it depends on the barometric pressure at that particular time and
>location).  Whether the gauge might need re-zeroing or re-oneing [:-)]
>depends on the actual gauge and whether it reads in bar (absolute) or psig
>or whatever.
>
>At 07:56 PM 10/30/1999 -0400, Fred Munro wrote:
>>What does the gauge read with the engine off? Is it right on 0 or offset
to
>>the vacuum side? If it is not on 0, you will have to re-zero the gauge.
>>
>>Fred Munro
>>'94 S4  91k km
>>
>>----- Original Message -----
>>From: TM <mizutanit@mindspring.com>
>>To: Quattro List <quattro@audifans.com>
>>Sent: Saturday, October 30, 1999 4:19 PM
>>Subject: Boost gauge problems
>>
>>
>>> Hi listers,
>>> I have a VDO boost gauge in my A4 1.8T. I recently removed the gauge to
>>> paint the gauge housing, unhooking the two electrical wires and
unscrewing
>>> the vacuum line. Ever since doing that, I get a much lower reading.
>>>
>>> Is there a "recalibration" or some sort of reset necessary when
>>reinstalling
>>> the gauge? I checked for leaks, and I don't seem to find any leaks. The
>>> line has a threaded coupling that is sealed with Teflon tape.
>>>
>>> For whatever reason, I think the gauge is reading about 5 psi low- I get
>>> about 22 vacuum at idle when I used to read about 20, and max boost now
>>> only goes to 15 when it used to overboost to about 20 psi.
>>>
>>> Any help diagnosing/fixing this problem is greatly appreciated.
>>>
>>> Thanks,
>>> Taka Mizutani
>>> 99.5 A4 Avant 1.8TQMS
>>>
>>>
>>
>>
>>
>___
>   Bob
>***********************************************************************
>* Robert L. Myers  rmyers@inetone.net          Home 304-574-2372      *
>* Rt. 4, Box 57,  Fayetteville, WV 25840 USA   WV tag Q SHIP          *
>* '95 urS6  Cashmere Grey - der Wunderwagen    ICQ 22170244           *
>* http://www.cob-net.org/church/pvcob.htm  MediaRing Talk 304-574-1166*
>***********************************************************************
>