re. Low control pressure and/or high system pressure????

[Ben Swann]

Got one if you need it.

I had an interesting problem which cause my UrQ to be dumping fuel at idle.
The little lip that acts as throttle plate stop had broken off causing the
plate to be open at idle.

Can't think of much else now, only that something may be lodged in the
metering unit causing it to run to rich.

Ben

[Date: Wed, 17 Aug 2005 20:54:54 -0400
From: "Cody Forbes" <cody at 500tq.com>
Subject: Low control pressure and/or high system pressure????
To: <quattro at audifans.com>
Message-ID: <000801c5a38f$73245960$6600a8c0 at nuvolari>
Content-Type: text/plain; charset="iso-8859-1"

I was driving along after a long trip in my '86 5k-t-q KZ engine and as I
was exiting the highway at my exit I noticed the engine didn't want to rev
above 3000rpm. Driving to my house I experimented and found no way no how
was the engine going over 3 grand, even clutch in and WOT. I didn't do much
more then park it in my driveway after that, as I had just driven 800miles
in a day. 4 weeks later I decided to take it to work (was carpooling). On
the way in I decided it was the fuel filter being clogged. I replaced the
filter, then dumped out the old one and found a ton of nasty stuff
confirming my guess. When I went to leave work I had no change.

What it seems to be doing after further investigating is the system seems to
run exponentially richer as load increases. If I have my allen wrench on the
fuel plate adjustment and hold the throttle wide open (engine goes to
3000rpm - no more) then push down on the allen the engine accelerates. If I
adjust it at idle to where the engine sounds happy my effective rev-limit is
3000rpm, but if I adjust it while holding 2500rpm until the engine sounds
happy it goes so lean at idle that it wont run. A new set of plugs turned
utterly BLACK after about 2.5 miles of driving with the adjustment as lean
as I could get it. When I hold it WOT and look at the rear I can see clouds
of black smoke.

Please tell me something other then "call worldpac and order a $180, at cost
($336 list), pressure reg"!

-Cody]