how to fix P0302 misfire code in my Ford F-150 14th Generation (2021-2024)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and disconnect the battery before starting.
• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester.

2. Replace Spark Plug

• Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the old spark plug for wear; install a new spark plug with the correct gap setting (typically 0.030” for F-150).
• Reinstall the ignition coil, ensuring it is seated properly and reconnect the electrical connector.

3. Replace Ignition Coil

• If the spark plug is not the issue, proceed to replace the ignition coil.
• Remove the ignition coil as described above.
• Install the new ignition coil and torque to the manufacturer’s specifications (typically around 7-11 ft-lbs).

4. Inspect/Replace Fuel Injector

• If misfire persists, disconnect the fuel rail and remove the injector for cylinder 2.
• Inspect the injector for clogs and clean if necessary; replace if damaged.
• Reinstall the fuel injector, ensuring proper alignment and sealing.

5. Compression Test

• If all components are in good condition, perform a compression test on cylinder 2.
• If compression is low, further investigation into internal engine components may be required (e.g., piston rings, valves).