CIS-E air by-pass

[Huw Powell]

> I know that on many CIS-E3 systems the idle screw on the throttle body
> is supposed to be closed completely.  The ISV should handle *all* the
> air bypass chores.  If you were to open up the idle screw you will not
> be able to achieve optimum ISV operation.

On the 88-92 type 89's, there is *no* idle screw, they finally ran out 
of the old throttle bodies or something.

By the way, in my experience, if all else to set right, idle correction 
hunting when lifting off is correctable by *very* slight adjustments of 
static fuel mixture (the 3 mm screw).

Once everything is exactly right, the ECU knows how much to run the ISV 
and it's dead on before the rpms even fall all the way.

This only applies to the CIS-E and E3 systems on the Audi type 85 & 89, 
of course.  The type 44 n/a cars are probably exactly the same, though.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/