weird.. you've definitely got a lean condition.. sounds like something(computer/faulty wiring) is holding the IAC open.. you'll probably want to test the voltages in the IAC wiring.. make sure all the connectors are clean and secure, both from the wire to the IAC, and the computer's wires
2003 3.8L V6 4R70W
Windstar Upper Intake with cool-air intake, MAC LT headers, BBK O/R H-pipe, and flow 40s, SCT tuner, FRPP Alum. D/S, 3.73 gears, Auburn HP limited slip, and Team Z LCAs, Eibach sway bars.
Best 1/4 time: 15.036 @90.92mph, 2.148 60'