ISV has me puzzled!

[David Eaton]

certainly normal behaviour for a motronic controlled  isv, not too sure
about an older car.  check the resistance across the isv.  a normal isv
should show a resistance between 7.5 to 8.5 ohm).

for more details, check out phil payne's site
http://www.isham-research.freeserve.co.uk/quattro/isv_test.html

dave
'01 s8

 -----Original Message-----
From: CTDiesel at aol.com
Date: Sat, 3 May 2003 06:52:27 EDT
Subject: ISV has me puzzled!

--
on my 874kq Just doing some random checks to see why i'm having cold start
problems...and I noticed with a warm/hot engine if i unplug the ISV the idle
increases to about 1200rpm. Plug it back in and the idle returns to 850rpm.
Isnt that wrong?.  I thought and have seen if you unplug the ISV the idle
drops to ~500rpm and then plug it in then you get the normal 850rpm.   Can
anyone verify that?  If so that may mean i have way too much air going into
the engine at cold start.

The duty cycle must be way off if thats the case. When hot should be 25-27%
I
wonder if its higher now.