Off idle stumble when warmed up

[R Mangas]

   Check the potentiometer on the airflow sensor?  Cruddy connection or
maybe it's just flaking out.  The output from this is used for accel
enrichment.

$0.01,
Robert




>From: "Cade Carvell" <ccarvell at nbsusa.com>
>To: <quattro at audifans.com>
>Subject: Off idle stumble when warmed up
>Date: Tue, 28 Jan 2003 16:42:54 -0600
>
>Hi all,
>   My 87 4kq, has developed an off idle stumble.  Here in Minn. it is
>now 10-20 degrees on a good day.  Anyway, It has lately started giving
>me an off idle stumble, ie at a stop sign, idleing normal and warmed up
>fully, then i go to hit the gas and move, and well, it just kind of
>falls over itself, then all of sudden (usually after 10 seconds), it
>picks right up and off we go.  The odd thing is this doens't happen all
>the time, and seems to be most prevalant when the car is fully warmed
>up.  I did notice that when the engine is cold, not plugged in and left
>outside, it idles fine, but accelerations is a bit choppy, not real
>noticeable, but you can tell it is there.  I figure this is just because
>the poor car is at 0 or 10 degrees, and im lucky it still likes me enouh
>to start each morning.
>
>   I checked under the hood for vacumm leaks, but when it is 10-15
>degrees, this check doens't last long, before one loses feeling in there
>hands.  But I am figuring that it is a vacuum leak, everything else
>works great, plenty of power, etc.  Should this be something that I
>should worry about and find a heated garage, or is it just an annoyance
>that I can wait till spring to clean up.
>
>Thanks for an insight,
>
>
>Cade Carvell
>National Business Systems, Inc.
>2919 West Service Road
>Eagan, MN 55121
>Office: 651-994-4400


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