why is my Ford F-150's engine misfiring and showing P0301 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning the repair.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the spark plug wire or ignition coil from cylinder 1.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear or damage; replace if necessary. Use a new spark plug that meets OEM specifications.
• Torque the new spark plug to the manufacturer's specification (usually around 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Remove the ignition coil bolt using the appropriate socket.
• Disconnect the electrical connector from the ignition coil.
• Replace the faulty ignition coil with a new one that matches OEM specifications.
• Reinstall the ignition coil and torque to manufacturer's specification.
• Reconnect the electrical connector.

4. Inspect Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit (if necessary)
• Disconnect the fuel injector connector.
• Perform a resistance test on the injector using a multimeter; replace if outside specifications.
• If cleaning is needed, use the injector cleaning kit to clean the fuel injector.
• Reconnect the injector connector.

5. Reassemble and Reconnect Battery

• Reinstall any components removed during the process.
• Reconnect the negative battery terminal.