CIS-E air by-pass more....

[Jim Dupree]

On CIS-E cars you will still need to adjust the idle screw. You will be
setting the base duty cycle for the ISV.
On CIS-E3 cars the idle screw should be gently tightened all the way in.

Jim
1993 S4
1985 5kt

----- Original Message ----- 
From: "urq" <urq at pacbell.net>
To: <quattro at audifans.com>
Sent: Sunday, August 29, 2004 5:16 PM
Subject: Re: CIS-E air by-pass more....


> ... you didn't indicate the model and year, but I'm pretty sure all
"CIS-E" cars have an ISV (AKA AAR).  With an ISV the idle bypass should be
closed ... and your description sounds like a sticky valve.  It would be
worthwhile to try using carb cleaner or the like to try to free it up.  It
is best not to try moving the actuator inside the ISV yourself, just slosh
the cleaner around inside ...
>
> My former 4kQ had a high idle problem ... I found the idle bypass screw
was open ... closed it and started having the symptoms you describe.  I
ended up swapping in another ISV, but it was because I had one on the shelf
...
>
> Steve B
> San Jose, CA (USA)
>
> CTDiesel at aol.com wrote:
> So if the screw should all the way closed then everytime i depress the
clutch at the stop light the car nearly stalls drops to 200rpm and then back
up to normal idle. I have check the throttle switch and it is good (ohms)
and have cleaned and checked the ISV and it is good as well as all the
wiring. THe mixture is set to specs as well and timing is right on. SO what
would cause the this problem?
>
>
> DJ
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