[urq] Ideas for rough running continued - Solved!

Ingo Rautenberg i.rautenberg at waratap.com
Thu Apr 7 13:08:29 EDT 2005 

Just the center bolt.

If there's a problem, then

Remove the fuel distributor from the air-meter assembly (3 bolts) and then
there's 2-3 more near the back that might still be attached to things like
the Frequency valve and hose clamp(s).  Then remove the air cleaner clips
and lift out.

----- Original Message ----- 
From: "Ed Kellock" <ekellock at gmail.com>
To: "UrqList" <urq at audifans.com>
Sent: Thursday, April 07, 2005 1:02 PM
Subject: Re: [urq] Ideas for rough running continued - Solved!


> Will do.  Was about to dive in like that last night, but hesitated to
> wait for some direction just like this.  Thanks!
>
> So just remove the one bolt in the center of the plate?  I was
> thinking I would have to remove the 6 or 8 bolts around the top of the
> whole metering head and lift all that away.
>
> Ed
>
> On Apr 7, 2005 10:04 AM, Ingo Rautenberg <i.rautenberg at waratap.com> wrote:
> > Check that throttle plate!  Simply remove the igloo and check for free
> > play/resistance.  If it appears to be binding, remove the plate by
> > unscrewing the 10mm bolt and spring washer and removing the plate to
> > inspect.  No diddle-daddling... ;-)
> >
> > ----- Original Message -----
> > From: "Ed Kellock" <ekellock at gmail.com>
> > To: "UrqList" <urq at audifans.com>
> > Sent: Thursday, April 07, 2005 11:50 AM
> > Subject: Re: [urq] Ideas for rough running continued - Solved!
> >
> > > The tach needle drops to zero as if the power to it went away.  When
> > > power returns, it pops back to whatever rpm the engine is turning at
> > > the moment.
> > >
> > > Ed
> > >
> > > On Apr 7, 2005 8:16 AM, Ingo Rautenberg <i.rautenberg at waratap.com>
wrote:
> > > > Ed,
> > > >
> > > > When you say the tach drops, does it drop with associated engine rpm
or
> > does
> > > > it just drop to nothing like the power to the tach needle was
clipped.
> > Mine
> > > > would drop, too, but I couldn't discern whether it was electrical or
> > because
> > > > the fuel/air was effectively shut off -- which in my case it was.
Have
> > you
> > > > checked the metering plate for any kind of binding yet?  Mine got
> > > > progressively worse to the point it wouldn't start at all...
> > > >
> > > > ----- Original Message -----
> > > > From: "Ed Kellock" <ekellock at gmail.com>
> > > > To: "UrqList" <urq at audifans.com>
> > > > Sent: Wednesday, April 06, 2005 9:41 PM
> > > > Subject: Re: [urq] Ideas for rough running continued - Solved!
> > > >
> > > > > I may have had an "AHA!" moment.
> > > > >
> > > > > I went out the adjust the distributor subsequent to my weekend
post
> > > > > and Ingo's response to see if anything changed with my ignition
> > > > > cutout.  It didn't.  The car started easily but sure enough the
> > > > > ignition cutout is still there.
> > > > >
> > > > > As I sat there opening and closing the throttle, I noticed that
the
> > > > > cutout seemed to occur as soon as I lifted my foot.  Once in a
while
> > > > > it would happen a moment later as the rpms fell.  It did it
reliably
> > > > > enough that I believe I can connect the behavior with the symptom.
> > > > > Not high rpm's involved, most of the time it was nothing over
2500.
> > > > >
> > > > > When the ignition cuts out, the tach needle drops every time but
the
> > > > > fuel gauge seems to be unaffected.  And the relay in the fuse
panel
> > > > > that clicks doesn't do it every time, only when the duration of
the
> > > > > cutout is longer.
> > > > >
> > > > > What's the gizmo that holds the idle up a bit until the car warms,
the
> > > > > idle control?  I think the temp sensor for mine is somewhat
defective
> > > > > because the rad fan had already kicked on once before the idle
control
> > > > > let the idle drop down to a more normal warm idle.  As soon as
this
> > > > > occurred the cutout started happening by itself repeatedly but not
> > > > > necessarilly enough to kill the engine.  When I opened/closed the
> > > > > throttle to keep it running I found that I could reproduce the
cutout
> > > > > much more directly always on decel or lift throttle.
> > > > >
> > > > > Anyway, all of this reminded me of Ingo's sticking fuel plate
spring.
> > > > > Now, maybe I'm pairing apples and oranges a bit here, but the
> > > > > similarity is interesting at very least.
> > > > >
> > > > > Is there any relation between the lack of air flow and resulting
fuel
> > > > > cutout as in Ingo's case and the ignition trigger?
> > > > >
> > > > > Ed
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Ingo Rautenberg" <irautenberg at comcast.net>
> > > > > To: "UrqList" <urq at audifans.com>
> > > > > Sent: Saturday, March 26, 2005 5:02 PM
> > > > > Subject: Re: [urq] Ideas for rough running continued - Solved!
> > > > >
> > > > >
> > > > > > It was the Airflow meter.  Now I need to have my exhaust
reattached
> > > > > > (currently held together with baling wire).  Really quite
> > > > > remarkable.  After
> > > > > > replacing almost every conceivable possible problematic piece
(save
> > > > > entire
> > > > > > engine or turbocharger) with known good, I decided to look at
the
> > > > > airflow
> > > > > > metering plate again, which I initially thought was binding, and
> > > > > compared it
> > > > > > with another that I had just recently bought.  What I discovered
was
> > > > > that it
> > > > > > was not sticking against the venturi wall, but rather that the
pin
> > > > > that
> > > > > > rests on the leaf spring had actually worn a hole in it!  On
decel,
> > > > > it would
> > > > > > essentially stick, the pin lodging itself into the hole, choking
off
> > > > > air and
> > > > > > fuel.  It would not restart unless I turned the CO screw to
richen
> > > > > the
> > > > > > mixture, which would apparently plop the plate up again.  Some
pics:
> > > > > >
> > > > > > As seen from below (air filter side):
> > > > > > http://www.dtwaudi.com/album_pic.php?pic_id=2093
> > > > > >
> > > > > > And from above with mtereing plate removed:
> > > > > > http://www.dtwaudi.com/album_pic.php?pic_id=2094
> > > > > >
> > > > > >
> > > > > > I highly recommend anyone who has similar sysmptons look at
theirs
> > > > > by taking
> > > > > > off their igloo, removing the air metering  plate (10mm bolt)
and
> > > > > inspecting
> > > > > > the "rest" area for wear or wear-thru.  Maybe that's your
problem,
> > > > > Ed.
> > > > > >
> > > > > > Ingo (tired but glad I finally found the problem)
> > > > > >
> > > > > > Happy Easter!
> > > > > >
> > > > > > _______________________________________________
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> > > > > _______________________________________________
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