[urq] Stumbling

[Ingo Rautenberg]

A guess, but I had a similar instance that turned out to be a corroded lead
to the fuel pump.  Cleaned it up, did the relay mod and smooth sailing.
Wouldn't be surprised, though about the fuse block (especially if it's early
'83 or before). BTST

-Ingo
'91 200q20v...Slightly modified
'84 Urquattro
'91 v8q 5-speed w/ lots of mods :-)
http://hometown.aol.com/quattringo/index.html

----- Original Message ----- 
From: "Thatcher Hubbard" <thatcher.hubbard at gmail.com>
To: "Urq List" <urq at audifans.com>
Sent: Wednesday, November 24, 2004 4:14 PM
Subject: [urq] Stumbling


> My problem lingers, though I haven't been aggressively trying to fix
> it.  But I noticed a couple more things that make me wonder if it's
> not an electronic problem.
>
> First, when the problem happens, the revs drop, but I can hear the
> engine still firing.  But, the tach drops to zero and then bounces
> back up again right away.  It will do it when I'm off the throttle
> (coasting) too.
>
> Second, which sensor is it that can cause the fuel pump to cut out?
> The MAP sensor in the ECU?
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