how to fix the engine misfire P0301 in my Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover, if applicable.
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 1.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install the new spark plug by hand to avoid cross-threading and then torque to the manufacturer's specification (usually around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Check and Replace Ignition Coil (if necessary)

• If the ignition coil appears damaged or if the spark plug was fine, consider replacing the ignition coil for cylinder 1.
• Tools Required: Socket set.
• Remove the coil as described above.
• Install the new ignition coil and reconnect the electrical connector.

4. Inspect and Test Fuel Injector

• Tools Required: Fuel injector tester or multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Use the tester to check for proper voltage and functionality; replace if it’s non-functional.

5. Perform Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1.
• Insert the compression gauge into the spark plug well and crank the engine to get a reading.
• Compare the reading to the manufacturer’s specifications; if low, further investigation on engine internals may be necessary.

6. Reassemble and Clear Codes

• Reinstall any components removed during the repair.
• Reconnect the battery.
• Use the OBD-II scanner to clear the P0301 code.