how to fix the P0301 code on my Ford Mustang S650 (2024-Present) misfire?

Solution

1. Preparation

• Gather tools and materials, including a spark plug socket, torque wrench, fuel injector cleaner, and OBD-II scanner.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Use a spark plug socket to remove the spark plug from cylinder 1.
  3. Inspect the spark plug for signs of wear (e.g., carbon buildup, damage).
  4. If necessary, replace the spark plug with a new one that meets OEM specifications.
  5. Torque the new spark plug to the manufacturer-recommended specification (usually around 13-15 lb-ft).

3. Check and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil for cylinder 1.
  2. Remove the ignition coil from its mounting.
  3. Inspect the ignition coil for signs of damage or corrosion.
  4. If faulty, install a new ignition coil, ensuring it is seated properly.
  5. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Remove the fuel rail from the engine, taking care to relieve fuel pressure beforehand.
  2. Carefully remove the fuel injector for cylinder 1 from the rail.
  3. Clean the injector using a fuel injector cleaner or replace it with a new unit if it is clogged.
  4. Reinstall the injector and ensure proper seating in the fuel rail.

5. Reassemble and Test

• Sub-steps:
  1. Reattach the fuel rail to the engine and ensure all connections are secure.
  2. Reconnect the negative battery terminal.
  3. Start the engine and let it reach operating temperature.
  4. Monitor for any check engine light reappearance and observe engine performance.