Idle Hunting - '87 5kcstqw -> Bad ISV

[Bill Rowe]

that's interesting..... i thought all type 44 isv's were identical or at
least interchangeable?  I have about a half dozen of isv's i've collected
from junk yards over the years and other than few slight differences in p/n
they appear identical in construction.  i remember a while back blau had
some cheap new ones (made in japan).  give them a call or check their site.

-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of Swann, Benjamin R. (BSWANN)
Sent: Saturday, October 13, 2001 10:51 PM
To: 'S. Jaworski'; Swann, Benjamin R. (BSWANN)
Cc: 'quattro at audifans.com'
Subject: RE: Idle Hunting - '87 5kcstqw -> Bad ISV


I swapped the ISV with a known good working one.  The car ran fine.

Put the cuprit into another identical make and model '87 5kcstqw - problem
transferred over to the other vehicle.  That make it pretty high odds it is
the ISV, probably 99.99%.

Yes, I now have two turbo quattro wagons - liked the first one so much, I
got another for my wife.  This time she liked the color and interior, etc.

It is always helpful to have identical cars for this purpose.

I tried to clean the ISV.  No go.  This unit is defective electronically
AFAIK.  that is why disconnecting the connector did not cause the idle to
drop as it should.

Now, it would be nice if the things weren't so darned expensive at the
dealer.  It would also be nice if there was more interchangeability with the
other models in similar years.  I have spare 4000Q ISVs, an 80 4cyl ISV, and
an NG 2.3l ISV - all are different from the others and from the turbo ones.

Ben

-----Original Message-----
From: S. Jaworski [mailto:syljay at optonline.net]
Sent: Saturday, October 13, 2001 1:00 PM
To: BSWANN at arinc.com
Subject: RE: Idle Hunting - '87 5kcstqw


Tell us more. We like the nitty gritty of your analysis and troubleshooting.

Did'nt you say that you disconnected the ISV  ..  with no changes?

Did you install a new ISV?  Or, did you clean the old one?


Insatiatably Curious.

Syl

88 5kq
90 100q


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