On the driver's side of the F 150 carb, there should be the linkage for the throttle. On the linkage there should be a set screw that you can turn to adjust the engine idle.
probably a bad idle air controller.
Most likely computer controlled and not adjustable
Idle is computer controlled and is not adjustable.
You can not adjust the idle screw, it is sealed off at the factory. If you are having a high idle problem check for a vacuum leak or a bad idle air control valve. These will commonly cause a high idle.
To adjust the carburetor on your 1984 Jeep CJ7 with a 6-cylinder engine, start by ensuring the engine is at operating temperature. Check the idle speed and mixture; adjust the idle speed screw to achieve the manufacturer's recommended RPM, typically around 600-800 RPM for this model. Then, use a vacuum gauge or a tachometer to adjust the mixture screws for the best idle quality, aiming for the highest stable vacuum reading or smoothest operation. Finally, recheck the idle speed after mixture adjustments and fine-tune as necessary.
At the base of the carburetor are 2 screws. One adjusts the idle speed and the other adjusts the idle mixture. Screw the idle mixture in until the engine starts missing then screw it out 1 turn. Then, adjust the idle speed screw to about 850 RPM.
To adjust the carburetor on a 6-cylinder Ford engine, start by ensuring the engine is warmed up and idling smoothly. Use a screwdriver to adjust the idle mixture screws, turning them in or out to achieve the highest and smoothest idle speed. Next, adjust the idle speed screw to set the desired RPM, typically around 600-800 RPM for most models. Finally, double-check the adjustments by re-evaluating the idle quality and making any necessary fine-tuning.
To adjust the idle on a 1984 Chevette, first, make sure the engine is warm and running. Locate the idle adjustment screw on the carburetor, which is typically found on the side. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it, checking the RPMs with a tachometer if available. Once you achieve the desired idle speed, ensure all connections are secure and the engine runs smoothly.
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.
You adjust idle with idle timing
Adjust idle on Mitsubishi diamante
To adjust the curb idle on a 1984 Mercury Grand Marquis, locate the idle speed adjustment screw on the throttle body. Start the engine and allow it to reach normal operating temperature. Use a tachometer to measure the RPM, then turn the idle speed adjustment screw clockwise to increase or counterclockwise to decrease the idle speed, aiming for the recommended RPM specified in the owner's manual. Finally, recheck the idle speed after adjustments to ensure it’s within the correct range.