To replace 4kq ISV or not?

[Chad Frederick]

The 84 4kq is having a hard time staying running when cold.  It starts just
fine, then stalls, and does this serveral times until eventually  it idles
very slowly and begins to run.  It will also die when the throttle slams
shut and I have the clutch in.  It seems to be getting worse now that it is
colder outside.  Once it is warmed up the car runs great.  I have tried
cleaning the ISV serveral times without any change in performance (seemed to
really work well on my old 90q20v).  I have fixed all the vaccuum leaks I
could find.  I have discoverd the car does not have any stalling/almost
stalling problems when the ISV is dissconnected.  This is why I think the
ISV is the culprit, so how else do I test it?  I own a digital multi meter.

So should I spend $179 at TPC for a new ISV or try something else before I
spend the money on something that might not fix it?

Does someone in Seattle have a good/functioning 4kq ISV I can buy or borrow
to diagnose?

Thanks,
Chad Frederick
84 4kq
92 S4