[urq] More Weird UrQ Behavior

[dgraber460 at aol.com]

 My first instinct is fuel delivery. Are you using the URQ OE fuel pump? Does it have the _capacity_ to feed a larger displacement motor at sustained high RPM? If the tach stays operational etc then it is likely fuel related. If the tach drops to 0 then it could be an electrical/spark problem.
Years ago I had an old V12 Ferrari that had 2 fuel pumps. A mechanical on the block, and an electric at the tank. The electric was dash switched for full throttle runs as the other would volume starve.


Dennis 
Denver



-----Original Message-----
From: AF <afinn1 at gmail.com>
To: urq <urq at audifans.com>
Sent: Fri, Mar 26, 2010 1:21 pm
Subject: [urq] More Weird UrQ Behavior


So, at the past 2 track events I've attended with my V8 UrQ I have had a
eird issue with engine cutout at high rpms, usually in 3rd gear, but on the
traightaways in 4th gear. They seem to occur during any throttle position,
ike cresting a hill, or accelerating out of a corner, which is somewhat
nnerving. There are no fault codes thrown at all, which makes me think it's
 fuel supply issue. Here's the weird thing, I would say it a fuel pump
elay issue, but wouldn't the engine stall (that's what my old UrQ and Coupe
T would do on the highway), but in this case there's no power until I
epress the clutch after slowing a little and downshifting, then the power
s all back. The engine never stalls and shuts off! I confirmed it's not a
ev limiter issue by redlining with moderate throttle input and no issues
ccured. It's definitely at higher RPM though. Does anyone have a thought? I
hought about relaying the fuel pump, but wouldn't the engine simply stall
ith no fuel supply, or will it simply keep running with the car in motion
nd clutch out without shutting down or turning on all the warning lights on
he dash?
Any help is appreciated. Thanks.
Andrew Finney
985 UrQ 4.2L ABZ
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