re.high idle after cleaning isv

[Huw Powell]

> >     When the ISV is unplugged in my 90q20v the idle drops to around 700rpm
> >or so.  On my 80 the idle would go bonkers if the ISV was disconnected, up
> >and down rapidly unless the DPR was disconnected as well.  Then when both
> >were disconnected the idle dropped on that car too.
> 
> So basically, what the freaking h*ll is the ISV needed for???? :)

most of these stories are warm engine tales.  with a cold engine, your
ISV lets in 3 times as much air and keeps the thing running.

You could tune it to idle fine, warm, but then cold you'd have to give
it air via your right foot.

also there is the issue of unintended ISV, ie leaks in the plumbing, and
possible tunings to accomodate those leaks.  factors that will throw
everything off.

at warm idle, an ISV lets in *less* air running than unplugged.  When
cold, more air.  I think...

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/