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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Allow the engine to cool if it has been running.

2. Inspect Spark Plug and Ignition Coil

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts.
• Disconnect the electrical connector from the ignition coil.
• Remove the spark plug using a spark plug socket and inspect it for signs of damage or fouling.
• Replace the spark plug if necessary (ensure it meets OEM specifications).
• Reinstall the ignition coil and secure it with the mounting bolts, tightening to the manufacturer’s specified torque.

3. Check for Vacuum Leaks

• Visually inspect all vacuum hoses and the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner around suspected leak areas while the engine is running to identify leaks.
• Repair or replace any faulty hoses or gaskets.

4. Perform Compression Test

• Tools Required: Compression tester.
• Remove the ignition coil and spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine several times to get a reading.
• Compare the compression reading to manufacturer specifications; if low, further investigation is needed (potential valve or head gasket issues).

5. Inspect Fuel Injectors

• Check the fuel injector connector for proper connection and damage.
• Perform a resistance test on the fuel injector using a multimeter to ensure it is functioning properly.
• If the injector is faulty, replace it with an OEM part and reconnect.