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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Ensure the engine is cool and disconnect the negative battery terminal.

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector for cylinder 1.
• Remove the ignition coil using a socket set.
• Remove the spark plug using a spark plug socket.
• Install a new spark plug, ensuring it’s gapped correctly (refer to manufacturer specifications).
• Torque the spark plug to the manufacturer’s specifications.
• Reinstall the ignition coil and connector.

3. Test and Replace Ignition Coil (if necessary)

• Use a multimeter to test the resistance of the ignition coil according to specifications.
• If out of range, replace the ignition coil with a new one.
• Reinstall the ignition coil and connector.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Remove the injector using a socket set.
• Inspect for clogs or damage. If clogged, clean the injector using a fuel injector cleaner or replace it if necessary.
• Reinstall the fuel injector and reconnect the connector.

5. Perform Compression Test (if necessary)

• Insert the compression tester into the spark plug hole for cylinder 1.
• Crank the engine and record the compression reading.
• Compare the reading to manufacturer specifications; if low, further investigation is needed for potential engine issues.