Thanks for your question. If it is a SEFI enfine the idle should be controlled by the computer, and if it is CFI this a vacuum kicker and an adjusting screw to adjust. If the SEFI has idle problems, it might have other issues going on.
SEFI = Multiple injectors 8
CFI = 2 injectors in the center where the carb would be.
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FORD MOTOR COMPANY CAR AND POWERSTROKE SPECIALIST FOR OVER 16 YEARS. ASE MASTER SINCE 1991. CURRENTLY WORK AT A MAJOR FORD DEALERSHIP. GIVE ME YOUR FORD PRODUCT QUESTIONS, IF I HELPED, PLEASE HIT THE ACCEPT BUTTON. EXPERTS QUESTIONS ON FORDS WELCOMED

