The MAP and ECU screws are opposite.

Turn the MAP CCW to richen, CW to lean.
Turn the ECU screw CCW to lean, CW to richen.

The ECU screw won't have any effect on idle mix unless your TPIS is adjusted right.

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k