>The idle stabilizer valve is only necessary when the engine is cold or
>if you are using the airconditioner. You can remove and clean the valve

That isn't exactly true.  A properly tuned Digifant isn't going to run with
the ISV inoperable or will barely run.  If everything is right with the
injection
even warm, you pull that connector the engine should immediately stumble
and barely run.  If that is not the case, you likely have the idle bypass air
screw on the throttle body turned out so far it doesn't matter what the ISV
is doing perhaps also combined with tinkering to the idle enrichment screw
on the AFM.  Or the ISV is totally gummed up and stuck in an open position
so it doens't matter.  Carb cleaner followed by flushing with something less
caustic (WD40) will clean most of them up, adjustment procedures for the ISV
are well documented as well.  Oh ISV also functions all the time at steering
lock when the pressure switch on the P/S is closed.  But in reality with
a properly adjusted system, it functions all the time.  The old air valves on
the Digijet didn't do a thing except with A/C, P/S, or warmup, they were
simply open/shut and were not duty cycle feedback controlled.  A perfect
time to plug that I still have the '87 Digifant set for sale, that includes
the
ISV, control, ECU, dizzy, injectors, fuel ring, harness, AFM, etc all from
a wonderfully running van.  No t-body though.

John
jander14@wvu.edu