Idle Speed
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Ford RV Cutaway, 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, and 2002 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
Idle speed is controlled by Powertrain Control Module (PCM) and is not adjustable. If idle concerns exist, see appropriate symptom under SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V - DIESEL article.