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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery by removing the negative terminal.
• Allow the engine to cool if it has been running.

2. Replace Spark Plug

• Remove the spark plug from cylinder 1 using a spark plug socket.
• Inspect the spark plug for wear and replace if necessary (recommended gap usually found in the owner's manual).
• Install the new spark plug and torque it to the manufacturer's specified value (usually around 13-18 lb-ft).

3. Check and Replace Ignition Coil

• Remove the ignition coil from cylinder 1 by unscrewing it and disconnecting the electrical connector.
• Inspect the coil for cracks or damage; replace it if defective.
• Install the new ignition coil and ensure it is seated properly before reconnecting the electrical connector.

4. Inspect and Clean/Replace Fuel Injector

• Disconnect the fuel line from the injector and remove the injector from cylinder 1.
• Inspect the injector for clogs; clean it with a fuel injector cleaner if necessary or replace with a new injector.
• Reinstall the injector, ensuring proper alignment and sealing.

5. Compression Test (if needed)

• If misfire persists, perform a compression test on cylinder 1.
• Follow the manufacturer's instructions to attach the compression gauge.
• Record compression values and compare them against specifications (typically between 130-200 psi).
• If compression is low, further investigation into engine internals may be required.