how to fix the engine misfire causing P0302 code on Ford F-150 Fourteenth Generation (2021-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
  2. Extract the spark plug using a spark plug socket and ratchet.
  3. Inspect the spark plug for fouling, wear, or damage; replace if necessary.
  4. Gap the new spark plug according to manufacturer's specifications (typically around 0.030-0.035 inches).
  5. Install the new spark plug and torque it to the specified value (usually around 13-15 lb-ft).
  6. Reattach the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil is faulty, remove it from the cylinder head.
  2. Install a new ignition coil, ensuring it's seated properly.
  3. Reconnect the electrical connector and ensure it clicks into place.

4. Inspect Fuel Injector

• Sub-steps:
  1. Remove the fuel rail to gain access to the fuel injector for cylinder 2.
  2. Inspect the injector for dirt or clogging; clean or replace as necessary.
  3. Ensure the injector connector is secure and undamaged before reinstallation.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the trouble codes and reset the check engine light.