How do you adjust the idle on a 1995 Mustang GT?
Remove the black rubber plug that covers the air bleed screw located on top of the throttle body at the base of the boss that the IAC valve is bolted to. Adjust idle speed by turning the air bleed screw using a small Allen wrench until the idle speed is 700 +/- 50 rpm on the Mustang's tachometer. via
How do you adjust the idle on a Fox Body Mustang? (video)
https://www.youtube.com/watch?v=5Rv_Qfv4VKM
How do you adjust the idle on a 2003 Mustang? (video)
https://www.youtube.com/watch?v=A0oFWJOFF38
How do you adjust the TPS on a 5.0 Mustang? (video)
https://www.youtube.com/watch?v=HUwr0g5Qn7s
How do I change my idle speed? (video)
https://www.youtube.com/watch?v=qZKtnxAm4Vs