why is my Ford F-150 Fourteenth Generation (2021-present) engine misfiring

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the battery to prevent any electrical shorts.
• Allow the engine to cool down if it has been running.

2. Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover, if applicable.
  2. Using a socket set, carefully remove the old spark plugs.
  3. Inspect spark plug wires or boots for any damage.
  4. Apply anti-seize lubricant to the threads of new spark plugs.
  5. Torque new spark plugs to the manufacturer’s specifications (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coils

• Sub-steps:
  1. Remove the ignition coil connectors by gently pulling on the connector.
  2. Unbolt the ignition coils from the engine.
  3. Inspect the coil boots for wear or cracks.
  4. Replace any faulty ignition coils with new ones.
  5. Reinstall coils and reconnect the electrical connectors.

4. Check and Replace Fuel Injectors (if necessary)

• Sub-steps:
  1. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
  2. Disconnect fuel lines from the injectors using a fuel line removal tool.
  3. Remove the old fuel injectors and replace them with new ones.
  4. Reconnect fuel lines and ensure all connections are secure.

5. Reassemble and Reconnect Battery

• Sub-steps:
  1. Reinstall the engine cover and any other components removed during the procedure.
  2. Reconnect the battery terminals, starting with the positive terminal.
  3. Clear any error codes from the OBD-II scanner.