How do you adjust the idle on a 1994 Ford Mustang without a distributor?

The screw on the side throttle body

If its not a PCM with electronic engine idle control. Most of today veichles you can not adjust idle. What motor do you have cummins? Like can people be a little more specific??

Pull the Spout Connector Before changing Idle Screw and make sure its up to operating temp then turn the idle screw on the Throttlebody.Replace the Spout Connector then all should be well,If you disconnect the Battery for any length of time you must remove the Spout Connector again to allow it to Relearn the Position.