Yea you can adjust it but on the newer stangs The EEC baselines at whatever the closed throttle voltage is, as long as it's not waaaay out of spec (if it is, you'll get a code).
i was think of a FOX body
__________________ 1989 Mustang LX 5.0 Edelbrock Performer 5.0 EFI Intake Msd 6AL MSD blaster coil March Performance under drive pullys a/c ELIMINATOR smog ELIMINATOR cam bbk cold air bbk70mm THROTTLE BODY 73mm mass air ford raceing headers and H pipe 40 flowmasters T 5 TREMEC 373 9' ford rear end | 
