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

Solution

1. Preparation

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

2. Replace Spark Plug

1. Remove Engine Cover (if applicable)
   • Use a socket set to remove any screws or bolts securing the engine cover.
2. Disconnect Ignition Coil
   • Unplug the electrical connector from the ignition coil of cylinder 1.
3. Remove Ignition Coil
   • Unbolt the ignition coil using a socket wrench and carefully pull it out.
4. Remove Spark Plug
   • Use a spark plug socket to carefully unscrew and remove the old spark plug from cylinder 1.
5. Install New Spark Plug
   • Apply anti-seize lubricant to the threads of the new spark plug and torque it to the manufacturer’s specification (typically around 13-15 lb-ft).
6. Reinstall Ignition Coil
   • Place the ignition coil back onto the spark plug and secure it with bolts, then reconnect the electrical connector.

3. Inspect and Replace Fuel Injector (if necessary)

1. Remove Fuel Rail
   • Depressurize the fuel system and disconnect the fuel line. Unbolt and remove the fuel rail to access the injectors.
2. Replace Injector
   • Carefully pull out the fuel injector from the rail and replace it with a new one, ensuring proper O-ring placement.
3. Reinstall Fuel Rail
   • Reattach the fuel rail, ensuring all connections are secure.

4. Final Checks

• Reconnect the battery terminal.
• Start the engine and allow it to run for a few minutes.
• Check for any leaks around the fuel injector and ignition coil area.