how to fix P0301 misfire code on my Ford Mustang S550 (2015-2023)?

Solution

1. Preparation

• Gather tools and parts required for repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Remove Spark Plug

• Tools Required: Spark plug socket, ratchet, extension
• Remove the ignition coil cover (if applicable).
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil bolt and gently pull the coil out.
• Using the spark plug socket, remove the spark plug from cylinder 1.
• Inspect the spark plug for wear or damage, and replace if necessary.

3. Inspect and Replace Ignition Coil (if needed)

• If the ignition coil shows signs of damage or if the misfire shifts after swapping, replace the ignition coil.
• Tools Required: Ratchet, socket set
• Install the new ignition coil into cylinder 1, ensuring it is seated properly.
• Reconnect the electrical connector to the ignition coil.

4. Check and Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector puller, ratchet, socket set
• Disconnect the fuel line (be cautious of fuel spray; use safety goggles).
• Remove the retaining clips and disconnect the electrical connector from the fuel injector.
• Remove the fuel injector from the rail and inspect O-rings for damage.
• Replace the fuel injector if it is faulty.
• Reinstall the fuel injector, ensuring O-rings are lubricated and seated correctly.

5. Reassemble and Test

• Reinstall the spark plug and ignition coil.
• Reconnect the battery terminal.
• Start the engine and monitor for smooth operation.