The 2001 Ford Ranger XLT, like most modern fuel-injected vehicles,
does not have an idle adjustment screw in the traditional sense. The idle speed is controlled electronically by the Powertrain Control Module (PCM). There's no screw you can turn to manually adjust the idle.
If you're experiencing idle problems, the issue is likely related to a sensor, the throttle body, or a problem within the PCM itself. You'll need to use a scan tool to diagnose the problem, rather than trying to adjust any non-existent idle screw.
