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1) Disconnect the negative battery terminal.
....Optionally, disconnect the keep alive memory (KAM) connector in the small
....wire also landed to the negative battery terminal.
2) Wait at least 30 seconds.
Idle Speed Program Reset Procedure
4) Reconnect the KAM connector or negative battery terminal.
5) Start engine normally (never press the gas pedal).
6) Allow the idle speed to settle for at least 30 seconds.
7) Within 70 seconds of starting the engine, concurrently apply all accessory loads.
....a) Climate control to MAX A/C.
....b) Headlight switch ON, brights ON.
....c) Turn steering wheel slowly ~1/4 turn side to side.
....d) Press brake pedal.
....e) ATX SHOs only: shifter to DRIVE.
8) Do not turn off engine for at least 5 minutes.
Additionally, I have found that it is required to shut off the engine before you do anything else, like drive it around the block. In other words, at the end of the above procedure, turn off the engine.
I usually do "all that" but then I do drive it... I find it still runs a little funny until it sees a WOT event. At the first stop light she's found out what she needs to know. IIRC I thought there was something that said you should drive it somewhere between 30-90 seconds after you fire it up and the idle settles down...