Re: [20v] ‘91 coupe quattro idle speed and fuel mileage

[Wylie Bean]

I'd start with pulling the codes for clues. Short of that, I'd replace the temperature sensor in the back of the head. Sounds like its sending a false signal to the ECU. 


Wylie BeanGreensboro NC 90 CQ91 90Q20V91 200Q20V92 UrS401 S408 Q7
-------- Original message --------From: Christopher Gharibo <cgharibo at usa.net> Date: 5/10/18  6:26 PM  (GMT-05:00) To: quattro at audifans.com, 20v at lists.20v.org Subject: [20v] ‘91 coupe quattro idle speed and fuel mileage 
Whenever I start my CQ cold, the car stalls unless I keep the idle speed up with the throttle. Warm starts are fine. 

I used to get 360 miles a tank and now it’s down to 300 miles. 

I don’t know if these two things are related, but your advice would be greatly appreciated. 

The cold start valve has been replaced. The ISV has been cleaned and replaced. 

CG 
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