turn the idle screw!
probably a bad idle air controller.
Idle on a 1985 Honda Civic is adjusted through a idle air control valve. This valve is located near the intake. Adjust the valve by either loosen or tightening it.
You can adjust the idle.
Turn the Idle Adjusting screw.
Most likely computer controlled and not adjustable
To adjust the idle speed control on a 1985 Ford Escort, locate the idle speed adjustment screw on the throttle body. Start the engine and let it warm up to normal operating temperature. Use a tachometer to measure the idle RPM, then turn the adjustment screw to increase or decrease the idle speed as needed, ensuring it falls within the manufacturer's specified range. Finally, recheck the RPM after adjustments and ensure that the engine runs smoothly.
You cant. The idle is controlled by the ecu.
The idle speed is computer controlled
All Ford vehicles cannot adjust idle nor timing wich is pre-set at the factory and the computer sets the idle and timing, vehicles after 1990 no longer can be adjusted.
A bad IAC (Idle air control valve) or a vacuum leak or both.
Don't mess with that adjustment. The idle speed is electronically controlled.
Ford stopped manufacturing the Falcon in 1970.