Help, my 87 5kcstq is not happy--Fool Pump?

[Motor Sport Visions Photography]

Er, read dead :(. Perhaps the car is jealous of all the attention I have
paid of late to the 1983 ovloV 240 turbo wagon project car? I have
strived to give the 5kcstq equal attention so it wouldn't get jealous
but you know who these things can go ;-) I must have angered the Audi
gods in some way anyhow...

Here's the saga. Last Thursday night I am driving along (on
Felton-Empire Grade for you locals who know the road) and my car starts
to buck and gag, much the same way as when hitting overboost of the rev
limiter (in other words, abrupt). I find a safe spot to pull off and by
the time I get the hood open it died. I wound up getting the car towed
home and used the ovloV to get to Laguna Seca Friday for day two of
shooting the QCUSA driver's school (where I got some nice shots by the
way). When I got home Friday night I tried starting the car and low and
behold it ran fine (this bummed me out even more than the no AAA+ tow
bill since we all know how fun chasing elusive intermittents can be). I
tried driving it the next day...ran great, for a couple miles anyway ;-)
Thankfully this time it died close to home (where it is still sitting in
a pretty safe spot...I caught a cold at the track on Friday). I recall
resoldering my fuel pump relay and decided that it was worth a shot in
the dark to start there. Installed a new one yesterday and still no go.
It was pouring down rain and working in the fuse box in the rain is not
a good idea I found out...it got quite a bit of water in it off the back
of the raised hood :( Anyway, I tried to pull codes for "no start" and
none appeared to have set. I then ran the fuel pump output test and did
not hear that sound I know and love of a working fuel pump. Of course my
gas tank would be nearly full now too...just filled it in Monterey on
the way home Thursday night. So, my guess is that the fool pump has
suddenly gone kaput. But I am not 100% sure hence my long-winded post.

I will get the car back home and work on it there, perhaps not 'till the
weekend since we have two other running cars (if you can call a couple
olvoVs that). Meanwhile, can anyone provide a reliable means of making
sure it is the fool pump before I order one? My other thoughts included
the in-tank filter screen thing clogging up but I doubt that would cause
total and abrupt shut-down (would it?) or an open wiring connection
someplace (fuel pump relay has been replaced and the fuse is good). I'll
dig in deeper once the car is home and under cover of my carport. I know
I should pop the fuse panel up and make sure there is no damage
festering from the dousing of water I gave it in the rain yesterday and
will examine things closer there.

Any and all fool pump replacement BTDTs will also be appreceated.

Mike Veglia
Motor Sport Visions Photography
http://www.motorsportvisions.com