'91 Coupe quattro erratic cold idle

[Christopher Gharibo]

Which temperature sensor would this be?

Do you mean the multifunction temperature sensor?



Message: 3
Date: Tue, 5 Sep 2017 23:29:20 -0400 (EDT)
From: jlagnese at massed.net
To: Christopher Gharibo <cgharibo at usa.net>
Cc: 20v at lists.20v.org, quattro at audifans.com
Subject: Re: '91 Coupe quattro erratic cold idle
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A temperature sensor? 

----- Original Message -----

From: "Christopher Gharibo" <cgharibo at usa.net> 
To: 20v at lists.20v.org, quattro at audifans.com 
Sent: Tuesday, September 5, 2017 4:24:15 PM 
Subject: '91 Coupe quattro erratic cold idle 

My '91 CQ idle vacillates between 200-1000 when engine cold. If I release the accelerator when engine cold, the car may stall. Turning the AC on keeps the car from stalling. 

I cleaned and swapped the ISV without success. Any other thoughts? 

Thanks.