If my understanding of the operation of the Idle Stabilizer control unit is
 correct, that unit is in control of the idle only when the throttle
position  switch under the throttle body indicates a closed throttle.  The engine
continues to operate at high RPMs even when the throttle linkage is moved
so as  to cause the switch to tell the Idle Stabilizer Control unit that the
engine is  no longer at idle.  After the throttle is engaged control of the
engine  switches to the ECU.  If this is not correct I would appreciate
anyone who  could help me understand the process better.  I have been doing some
 reading in the Bentley manual as well as referencing the information
available  online and this is a good digest of how I think the system works.  The
 engine speed remains high even when the throttle is slightly engaged, I
may not  have made this clear in my first post.  I was a little tired when I
wrote  it.  Thanks, Rico

In a message dated 10/23/2009 12:57:59 A.M. Central Daylight Time,
billyandmelinda@CENTURYTEL.NET writes:

Replaced  Idle Stabilizer Control Unit.  Problem solved.  (No more  blinking
temp light either.)
Thanks to Zoltan for helping me with  this!

Melinda
Haleyville,  AL
KE4FRP