Sounds like either you have a sensor problem or you have a brain problem.
Have you replaced the oxygen sensor?  If not replace it as it can cause much
trouble.  If this doesn't help then try finding a fellow list member that
would allow you to borrow thier ECU to make sure this is not the problem.
Also I think there is another temp sensor to check (in the air flow meter
box?).
Let me know what you discover.
Ken Wilford
John 3:16