[urq] Mine will not read full : anyone have a fuel guage?

[Buchholz, Steven]

Bentley has a procedure you can use to tell which part is faulty.  You install a fixed value resistor of specified value in place of the sender, if the gauge does not read the correct level it is the gauge (or the voltage regulator) ... if the gauge measures correctly it is the sender.  IME the sender is the typical culprit (not only on Audis).  
 
On many other similar cars you can get a clue as to whether the voltage regulator is bad because other gauges (like coolant temp) will be malfunctioning too ... but on the urq only the fuel gauge is in the regulated circuit ...
 
Steve B
San Jose, CA (USA)

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True, if the sender is not replaced correctly the float can't rise fully.
yoIf
----- Original Message -----
From: "Thatcher Hubbard" <thatcher.hubbard at gmail.com>
To: "Urq List" <urq at audifans.com>
Sent: Sunday, October 08, 2006 3:08 AM
Subject: Re: [urq] Mine will not read full : anyone have a fuel guage?


As a datapoint Steve, mine has read a hair above 3/4 of a tank when I
fill it up since I bought the car.  Note that I know it's full based
on the amount I'm pumping into it.

I've heard that the arm that sits in the tank with the sensor on it
has a very small area in which it can swing as far as it needs to, and
that if they're not re-installed very carefully, this can happen.  My
dad had a 5ktqa which did the same thing until he messed with it.

On 10/7/06, steven j <michellepfeiffersx at yahoo.com> wrote:
> BTW  Prior owner put in a seperate boost gauge and put
> a temp gauge  in.   The full gauge reads 3/4 when I
> fill tank.  I think I once read this might happen if
> the regular 4k/cgt gas/temp gauges are used.  True?
> Can I trust that temp gauge as it might also be from a
> urq cousin vehicle?
>
> thanks - steve
>
> --- "Michael S. Williams" <oorqueue at gmx.net> wrote:
>
> > does anyone have a fuel guage for the urq that i
> > could have/buy? mine broke a while ago, and since
> > the odo doesnt always work that reliably, it's tough
> > to figure out when to fill up w/ gas.  it would be
> > great to know how much i got again...
> >
> > thanks everyone!
> >
> > and yeah, i finally have my car back and on the road
> > (after 6 years!), im sorting out a bunch of little
> > bugs, so im holding off on my report on my 034 efi
> > conversion w/ garrett gt2871 turbo, 3" downpipe,
> > tubular headers, 15-16lbs of boost (for now - till i
> > get a bypass/blowoff valve and something better than
> > the stock intercooler), short shift kit, wideband
> > a/f guage/sensor that i think feeds in to the ecu
> > for better a/f ratio control), etc etc...