Inconsistent fuel delivery

[SAM LETZRING]

Try looking at the pressurized fuel storage container which is right after
the fuel pump- could also be the check valve in the output port of the pump.

Bentley tells how to check all this stuff- I made my own pressure gauge out
of some old VW banjo fittings and a compression gause- works good enough to
tell what's going on.

sam


----- Original Message ----- 
From: "Andrew Duane" <andrew at savaJe.com>
To: "Quattro List" <quattro at audifans.com>
Sent: Thursday, November 10, 2005 12:47 PM
Subject: Re: Inconsistent fuel delivery


> Throttle dash-pot? They often get a little gunked up and stick.
> I removed the one from my '89 100Q, drove it another 100K miles
> without a hitch (and with a MUCH steadier idle).
>
> Hairy green toads from Mars made Matt Bliefernich say:
> >
> > Patient: '86 4kcsq
> >
> > Symprotms:  The car began by taking a long time to start,  I thought it
> > might be that fuel was draining out of the lines and needed to be pumped
> > back up before it would start.  Then it began to start fine and idles
fine
> > when cold but once warmed up a little it begins to vary between 2K rpm
and
> > the normal 900 to 1k rpm.  It will maintain the high rpms until the gas
is
> > pumped, then it will settle down to normal for a moment and return to
the
> > higher rpms.  This happens while driving as well to the point that while
> > accelerating you can feel it jump and settle under you.  Fuel Pressure
> > regulator?  Now yesterday on the way to work the windshield wipers,
windows,
> > sun roof, heater blower and rear window defroster suddenly stop working.
(I
> > checked all the other electronic systems and they all seem fine.)
> >
> > What I have done:  I checked all the fuses and relays and when I pulled
the
> > Fuel Pump Relay it literally fell apart in my hands.  I got a new relay
and
> > now the other electronic systems are working again with these few
quirks:
> > Emergency flashers are on when the switch is off and off when the switch
is
> > on,  dash lights no longer work, intermittent wipers no longer work nor
do
> > they return to rest when the control is turned off.
> >
> > Questions:  Could the fuel problems be the Fuel Pressure Regulator and
could
> > that be being caused by the electrical problems?  Any other ideas on the
> > electrical problems?  Is there something I am overlooking checking out?
Any
> > help would be greatly appreciated.
> >
> > Matt Bliefernich
> > '86 4kcsq
> > '03 A4tq
> >
> >
> > _______________________________________________
> > quattro mailing list
> > quattro at audifans.com
> > http://www.audifans.com/mailman/listinfo/quattro
>
> -- 
>
> Andrew Duane            Member Technical Staff - SPG
> SavaJe Technologies     andrew at savaje.com
> 100 Apollo Drive        p: 978.856.4943
> Chelmsford, MA 01824    f: 978.256.8386
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