Still have some problems - ahy ideas?

[Programmer]

>>It will run this way for
5-8 minutes (the IAC will  e maxed at 160, MAP will be somewhere
around 18-20), then all of a sudden the MAP will drop from that range
down to 13-15 and the computer will then be able to control the rpm
with the IAC valve (IAC is no longer maxed<<

Here's what I'm thinking---your IAC is supposed to open up KOER, but perhaps
it really isn't ?? All a scan tool shows is "commanded IAC" or what IAC
position should be--the later ones showed a preferred IAC setting, and then
an actual IAC setting on the scan tool. This would "explain" why your MAP
drops as the IAC breaks free from a stuck pintle seat. Or is it possible (if
this is a reworked ECU from the stock one), that the wiring is reversed at
the IAC ? 160 is seated--lower numbers are moving the pintle away from the
seat ?

Lyndon.