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Poor fuel economy

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Uwe Ross <uwe.ross@pobox> Fri, 23 Jan 1998 21:39:34 -0500
Re: I've got a problem here......... Mike Bigus <gtivr6r@chicagonet> Fri, 23 Jan 1998 20:44:22 -0600



From gti-vr6-owner@dev.tivoli Fri Jan 23 20:46 CST 1998
From: Uwe Ross <uwe.ross@pobox>
To: gti-vr6@dev.tivoli
Date: Fri, 23 Jan 1998 21:39:34 -0500
Cc: jglim@fast, "Loren B." <BLUE-DEVIL@webtv>
Organization: becnet.com
 
> Subject: I've got a problem here.........
&gt; From: &#66;LUE-DEVIL&#64;webtv<img src=/i/dn.gif border=0 width=35 height=15> (Loren B.)
> Date: Fri, 23 Jan 1998 11:09:09 -0500
&gt; Cc: &#106;glim&#64;fast<img src=/i/dn.gif border=0 width=35 height=15>
>
> List members,I need your help,Again!
> [Rotten Gas Mileage, no performance gain from Garrett chip]

I'd get the fuel pressures checked.  There's a vacuum operated pressure
regulator that has been known to malfunction and cause rotten mileage.
I'm sure the ECU will compensate for incorrect fuel pressure (to a
degree) because of the Oxygen Sensor feedback loop, but it will then be
operating at strange points in the maps.

-Uwe-

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From gti-vr6-owner@dev.tivoli Fri Jan 23 20:51 CST 1998
From: Mike Bigus <gtivr6r@chicagonet>
To: "Loren B." <BLUE-DEVIL@webtv>
Subject: Re: I've got a problem here.........
Date: Fri, 23 Jan 1998 20:44:22 -0600
 
Loren B. wrote:
>

<snip>

>                Can anyone on this list offer any help or advice
> regarding these problems? Has anyone had similar experiences? I have
> mentioned the fuel consumption problem to the dealer and they have said
> my mileage falls within VW specs but I have not Pushed the Issue yet. If
> I can go to them with some specific things to look at I'm sure they will
> comply with my request.  Any help you fellow list members
>  could provide would be greatly appreciated!

Loren,

This may or may not be your problem but Abe Getchell during the
installation of a ND front motor mount discovered a broken vacuum hose
just off the fuel pressure regulator at the far right side of the fuel
rail.  He was getting roughly 16 mpg, with regular driving and managed
9 mpg when he beat it hard.  After fixing the broken vacuum hose he
developed more power and the fuel economy came back, now he's 19-21
like most every one.  Also his car stunk of gas while sitting at a stop
light or in his driveway, now the smell is gone.


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http://www.gtivr6r.chicagonet.net/
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