how to resolve the P0302 misfire code on my Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, ratchet, torque wrench
• Sub-steps:
  1. Remove the engine cover (if applicable) using the socket set.
  2. Disconnect the ignition coil connector from the cylinder 2 ignition coil.
  3. Remove the ignition coil from cylinder 2 by unbolting it.
  4. Inspect the spark plug for wear or damage; replace if necessary.
  5. Install the new spark plug (Torque to the manufacturer's specification, typically around 13 lb-ft).
  6. Install the ignition coil, reconnect the connector, and secure with bolts.

3. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set
• Sub-steps:
  1. Relieve fuel system pressure by removing the fuel pump relay and starting the engine until it stalls.
  2. Disconnect the fuel rail and remove the fuel injector for cylinder 2.
  3. Inspect the injector for clogs or wear; replace if necessary.
  4. Install the new fuel injector, ensuring it seats properly in the rail.
  5. Reconnect the fuel rail and reattach the fuel pump relay.

4. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
• Sub-steps:
  1. Use a smoke machine to introduce smoke into the intake system while the engine is running.
  2. Look for any visible smoke leaks around the intake manifold and gaskets.
  3. If leaks are found, replace the affected gaskets or hoses.