[urq] Re: Circuit Diagram for '83 Quattro Coupe

[ben swann]

Thanks Ti and Michael and everyone else who has been providing good
bits and pieces of information to help me sort out what will become a
very nice UrQ to restore.

It looks like the recall may have been done, as what would have been
the original fused circuit appears to have been disabled.  There was no
fuel pump relay in the stock panel location.  I have not located the
source - relay or other that comes from the panel.

After replacing the locked up fuel pump, I was able to get the car
started.  AFAIK the car has not been run since around 1997.  I had to
drain and flush the tank and lines - the return line was blocked and I
cleared.  To my surprise the car started - roughly at first as much
rodent remnants were abrupty purged from the exhaust.  About a 2 pounds
of seeds were found behind the muffler, blown into a large pile.  The
car settled into a nice idle.

Ti - I'll appreciate any info you have on the recall as I have not
located the switched supply to the fuel pump.  I was able to provide
current directly from the battery.  It is clear how to install a relay -
 this has become standard procedure for the older VW/Audis for me, but
I have not owned anything '83 or older for some time.

Ben

[From: Ti Kan <ti at amb.org>
Subject: Re: [urq] Re: Circuit Diagram for '83 Quattro Coupe
To: mike at borderlinemotorsports.com (Michael S. Williams)
Date: Thu, 12 Jun 2003 22:34:57 -0700 (PDT)
Cc: quattro at audifans.com, urq at audifans.com (ury)

Michael S. Williams writes:
> At 9:12 PM -0700 6/11/03, urq wrote:
> >A few ury owners have installed a relay
> >and fuse in this location as a load reduction relay ... you can't
beat
> >getting power directly from the battery for the fuel pump.
>
> i actually just did this today... it was really simple actually...
>
> there was a 1+ volt drop at this connector, so the fuel pump was only
> seeing about 9.3 volts with the car on.
>
> now, with the relay there, it is seeing about 13.6 volts... quite the
> difference...

I hadn't been following this thread carefully, but those type 81/85
(4000/Coupe/UrQ) owners with the early (under-dash) fuse relay panels
may be interested to know that there had been a VW/Audi recall many
years ago to bypass the fuel pump circuit from the fuse relay panel
and relocate the fuel pump relay to an outboard position.  The wiring
inside the fuse/relay panel for the fuel pump circuit is insufficiently
rated to handle the current, and was causing voltage drops and
fuse/relay panel failures.

If your fuel pump relay is still plugged in directly to the fuse/relay
panel, then the recall work has not been performed.  I don't know
whether Audi will still honor that recall because it was over 20 years
ago (and whether the relay relocation wiring kit is still available).
You can make your own such wiring kit, however.  Those who need more
information can contact me offline.

P.S. This same recall also applied to all CIS-equipped VWs with the
     same fuse relay panel (late 70s and early 80s Rabbit and
Scirocco).]