Need more ideas to solve low idle problem

I've been crusing the archives to help me solve my hunting low idle problems for the last week.

What i've done:

Replaced IAC, TPS (and then set it with DMM), MAP sensor
Replaced: Throttle body with a used one AFTER i cleaned all the orfices with throttle body cleaner, toothbrushes and small brushes

I don't believe I hace a C101 connector though I hae check all the connectors under the hood

I have check and rechecked the vacuum lines and replaced the only one that had a loose fitting.

I can't figure out what to do next.

1989 Wagoneer Ltd. I6 Renix,

have u tried to turn up the idle?