how to fix the P0301 misfire code in my Ford F-150 Fourteenth Generation (2021-present)?

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the negative battery terminal to prevent electrical shorts.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Noid light
• Multimeter
• Vacuum gauge

2. Inspect and Replace Ignition Coil

1. Remove the engine cover if applicable.
2. Disconnect the electrical connector from the ignition coil for cylinder 1.
3. Remove the ignition coil using a socket and ratchet.
4. Install the new ignition coil, ensuring it is seated properly.
5. Reconnect the electrical connector.

3. Inspect and Replace Spark Plug

1. Remove the ignition coil (if not already done).
2. Use a spark plug socket to remove the spark plug from cylinder 1.
3. Inspect the old spark plug for fouling or damage; replace if necessary.
4. Install the new spark plug, ensuring the gap is set to the manufacturer’s specification (usually around 0.030-0.045 inches).
5. Torque the spark plug to the manufacturer's specification (typically around 13-15 ft-lbs).

4. Inspect and Test Fuel Injector

1. Remove the fuel injector wiring harness connector.
2. Connect the noid light to the injector connector to check for signal.
3. If no signal is detected, further diagnose the wiring or the engine control module (ECM).
4. If the injector is faulty, remove the fuel rail bolts and pull the fuel rail off to access the injector.
5. Replace the faulty fuel injector and ensure proper seating.

5. Perform Compression Test (if necessary)

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for several seconds and record the compression reading.
4. Compare the reading to the manufacturer’s specifications (usually around 120-200 psi).
5. If compression is low, further investigate potential causes (valve issues, head gasket failure).