I am a long-time lurker, and I have gained a lot of valuable knowledge from
this list, but it is time for me to come out of hiding.
I have come to the conclusion that I need to replace the idle stabilizer
control, but before I make that kind of investment, I would like your
advice.
In trouble shooting, I have discovered that the idle returns to normal if
the  idle stabilzer valve is unplugged, but the temp light blinks <?>.
With the valve connected, the temp light does not blink, but the idle goes
to 3000-4000 RPM.
I have replaced both temp sensors, cleaned and tested the IS valve, and
disconnected/reconnected  the power steering sensor with no result.
Any advice will be appreciated.
Melinda.