Three idle stages to control on a 2.6 (cold, base, and hot). All are controlled by different mechanisms. (aux air valve, thermal valve/FI soleniod, & air bypass screw via throttle body, respectively.) This is a great read on how to calibrate the above mentioned.
http://www.asashop.org/autoinc/feb98/techtips.htm

I hope I could help. I'm not sure if you have the vacuum routing, so here is a pic (88-95 2.6 non cali eq.)
[Linked Image]

Hope I could help. I'm sure there is a host of other things that could cause your issue.

Good Luck

Last edited by HillCntryTrooper; 12/12/05 05:26 AM.