Idle Control System
WARNING: This page is about a different car, the 1995 Ford Explorer and 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
Faults in idle control system or circuit should set a diagnostic trouble code. See QUICK TEST in the appropriate TESTS W/CODES - EEC-IV (4.0L) article. If diagnostic trouble code has not been set, see CIRCUIT TEST KE in the appropriate TESTS W/CODES - EEC-IV (4.0L) article for testing.