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Not sure if this newer PCM has a dashpot feature broken out yet like Ford stragegies. For the 91 and 95 stragegies, I find you can manipulate it with the table for IAC count vs coolant temp. If your strategy still has that table, might want to give a try.
The older ones target the table first, then Desired RPM vs RPM decays it down. Closer the table values are to actual idling steps, the quicker it drops to desired rpm.
 
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