To slow the cold start idle on your 1991 Mercury Capri, you can adjust the idle speed using the idle speed screw on the throttle body. Additionally, check the coolant temperature sensor and the idle air control (IAC) valve to ensure they are functioning properly, as they can affect the idle speed. If needed, you can also tweak the air-fuel mixture for optimal performance during cold starts. Always consult the vehicle's service manual for specific adjustments and procedures.
Right at the top of the engine you will find the carb immediatley to the right on the carb you will see a flat head screw this will adjust your idle , helps to have a second person on this.
the idle tensioner and or the distributor.
To adjust the idle on a 1984 Mercury Capri, first ensure the engine is at operating temperature. Locate the idle adjustment screw on the throttle body; this is typically a flathead screw. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it, aiming for the recommended RPM specified in the owner's manual. Finally, check the idle speed using a tachometer and make any necessary fine adjustments.
poor spark, poor fuel grade, fuel pressure, spark plugs, not getting enough air... one of the above
its controlled by the computer. sometimes if you have a vacume leak or something eles is wrong they wont idel right. so you may want to check for a vacume leak somewere first
1978 80 Mercury Outboard IDLE ADJUSTMENT
You adjust idle with idle timing
The idle is not adjustible. You may need to clean the throttle plate to improve the idle.
There is none. It is electronic. Try replacing the idle motor.
How high is your idle? idle should be 800rpm good oil pressure is obtained at this idle
Idle speed is set by the PCM and is not adjustable. A faulty idle indicates a more complex problem that should be diagnosed.