ISV has me puzzled!

[CTDiesel at aol.com]

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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.

Advice needed,
DJ