how to fix P0301 misfire code in my Ford Mustang S650 (2024-Present)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Instructions:
  1. Remove the engine cover if equipped.
  2. Disconnect the ignition coil connector from the spark plug.
  3. Remove the ignition coil from cylinder 1.
  4. Unscrew the spark plug using a spark plug socket and ratchet.
  5. Inspect the spark plug for wear or damage; replace if necessary with a new spark plug that meets OEM specifications.
  6. Torque the new spark plug to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Instructions:
  1. If the spark plug is in good condition, inspect the ignition coil for cracks or signs of damage.
  2. Replace the ignition coil if necessary.
  3. Reinstall the ignition coil and ensure it is seated properly.
  4. Torque the ignition coil mounting bolts to manufacturer specifications.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, multimeter.
• Instructions:
  1. Connect a fuel pressure gauge to the fuel rail to check pressure. Ensure it is within specifications (usually around 40-60 psi).
  2. If pressure is low, inspect the fuel pump and filter.
  3. Test the fuel injector resistance using a multimeter; compare readings with manufacturer specifications.
  4. Replace the injector if it is faulty.

5. Reassemble and Test

• Reconnect the ignition coil and any other components that were removed.
• Reconnect the negative battery terminal.
• Clear the error codes using an OBD-II scanner.