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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shock.
• Allow the engine to cool down before starting work.

2. Spark Plug and Ignition Coil Replacement

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from the ignition coil on cylinder 1.
• Unscrew the ignition coil using the socket set and remove it.
• Inspect the spark plug; if worn or fouled, remove it using the spark plug socket.
• Install the new spark plug to the manufacturer’s specified torque (typically 13-15 lb-ft).
• Apply dielectric grease to the ignition coil boot.
• Install the new ignition coil and reconnect the electrical connector.

3. Fuel Injector Inspection/Replacement

• Tools Required: Fuel injector removal tool, O-ring lubricant.
• If the injector is suspected to be faulty, disconnect the fuel line (use caution as fuel may spill).
• Remove the fuel rail if necessary to access the injector for cylinder 1.
• Carefully remove the fuel injector using the fuel injector removal tool.
• Inspect the O-rings; replace if damaged.
• Lubricate new O-rings and install the new fuel injector.
• Reassemble the fuel rail and reconnect the fuel line.

4. Compression Test (if needed)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the cylinder.
• Crank the engine several times and record the compression reading.
• Compare the reading to the manufacturer’s specifications.

5. Check for Vacuum Leaks

• Inspect vacuum lines for cracks or disconnections.
• Use a smoke machine or carburetor cleaner around the intake manifold to check for leaks.
• Repair any leaks found to ensure proper air-fuel mixture.