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

Solution

1. Preparation

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

2. Inspect Ignition Components

• Remove the engine cover (if applicable) using a socket set.
• Remove the ignition coil from cylinder 1:
  • Disconnect the electrical connector.
  • Remove the securing bolts using a socket wrench.
• Inspect the spark plug:
  • Remove the spark plug using a spark plug socket.
  • Check for signs of wear, fouling, or damage.
• Replace the spark plug and ignition coil if any damage is found.

3. Check Fuel Injector

• Remove the fuel rail (if necessary) to access the fuel injector for cylinder 1:
  • Depressurize the fuel system by removing the fuel pump relay and starting the engine until it stalls.
  • Disconnect the fuel lines using a line disconnect tool.
  • Unbolt the fuel rail and carefully lift it off.
• Test the fuel injector for continuity with a multimeter:
  • If the injector is malfunctioning, replace it.
• Reassemble the fuel rail and reconnect all hoses and electrical connectors.

4. Compression Test

• Perform a compression test on cylinder 1:
  • Remove the spark plug for cylinder 1.
  • Insert the compression gauge into the spark plug hole.
  • Crank the engine for a few seconds and record the pressure.
• Compare the reading to the manufacturer's specifications. If low, further engine diagnostics may be required.

5. Reassemble and Final Check

• Reinstall any components removed during the process.
• Reconnect the battery terminal.
• Start the engine and check for any leaks or abnormal noises.