how to fix my Ford F-150 14th Generation (2021-2024) if it keeps misfiring

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connectors.
• Remove the ignition coils using a socket.
• Use a spark plug socket to remove each spark plug.
• Install new spark plugs, torque to manufacturer's specifications (typically around 13-15 lb-ft).
• Reinstall ignition coils and reconnect connectors.

3. Inspect and Replace Ignition Coils

• Tools Required: Socket set, multimeter.
• If spark plugs were not the issue, test each ignition coil’s resistance with a multimeter (consult specifications for the correct resistance).
• Replace any faulty ignition coils with new ones.
• Reinstall ignition coils and ensure connections are secure.

4. Clean or Replace Fuel Injectors

• Tools Required: Fuel injector cleaner or new injectors, fuel line tools.
• For cleaning, use a fuel injector cleaning kit as per the manufacturer's instructions.
• If replacing, relieve fuel pressure, disconnect fuel lines, and remove old injectors.
• Install new injectors, ensuring they are seated correctly, and reconnect fuel lines.

5. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "on" position without starting the engine and check the reading against manufacturer specifications.
• If pressure is low, inspect the fuel pump and fuel filter for issues.