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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before beginning work.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil by unscrewing any retaining bolts and carefully pulling it off the spark plug.
  2. Unscrew and remove the old spark plug using a spark plug socket.
  3. Inspect the new spark plug's gap and adjust if necessary to manufacturer specifications (typically around 0.030 inches for the Mustang).
  4. Install the new spark plug and tighten it to the specified torque (generally around 13 lb-ft).
  5. Reattach the ignition coil and ensure it is securely connected.

3. Replace Ignition Coil (if defective)

• Sub-steps:
  1. If the ignition coil is faulty, remove it from the engine by unscrewing any retaining bolts.
  2. Install the new ignition coil in place and secure with bolts.
  3. Connect the electrical connector to the ignition coil.

4. Replace Fuel Injector (if needed)

• Sub-steps:
  1. Disconnect the fuel rail and carefully remove the fuel injector from cylinder 1.
  2. Install the new fuel injector, ensuring it is seated properly in the fuel rail.
  3. Reconnect the fuel rail and ensure all connections are tight.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and let it idle for a few minutes to check for any irregularities.