what is causing my Ford F-150's engine to misfire and throw a P0301 code

Solution

1. Preparation

• Gather tools and materials.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting any work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1.
  • Tools Required: Socket set, ratchet.
  • Safety Warning: Avoid contact with the ignition system while energized.
• Remove the spark plug using a spark plug socket.
• Inspect and replace the spark plug if worn or fouled.
  • Torque Specification: Tighten to manufacturer's specification (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil.
  • Use a multimeter to check the primary and secondary resistance of the ignition coil.
• If the ignition coil is faulty, replace it with a new one.
  • Tools Required: Socket set, torque wrench.
  • Torque Specification: Tighten mounting bolts to manufacturer's specification.

4. Check Fuel Injector

• Remove the fuel injector from cylinder 1.
• Inspect the injector for clogs or damage.
• Test the injector using a fuel pressure gauge to ensure proper operation.
• Replace the fuel injector if it is malfunctioning.
  • Tools Required: Fuel pressure gauge, injector puller.
  • Safety Warning: Relieve fuel system pressure before working on injectors.

5. Reassemble Components

• Reinstall the ignition coil and spark plug.
• Reconnect all electrical connectors and ensure they are secure.
• Reconnect the negative battery terminal.