how to fix P0301 misfire in Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaning kit.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Replace Ignition Coil and Spark Plug

1. Disconnect the negative battery terminal to prevent electrical shock.
2. Remove the engine cover if applicable.
3. Disconnect the electrical connector from the ignition coil on cylinder 1.
4. Remove the bolt securing the ignition coil and gently pull the coil out of the spark plug well.
5. Remove the spark plug using a spark plug socket and ratchet.
6. Inspect the spark plug for wear; replace if necessary (OEM specifications recommend Motorcraft spark plugs).
7. Install the new spark plug, torque it to 13 lb-ft (17.6 Nm).
8. Reinstall the ignition coil, securing it with the bolt and reconnecting the electrical connector.

3. Test and Replace Fuel Injector if Necessary

1. Reconnect the negative battery terminal.
2. Use a noid light to check for signal at the fuel injector connector for cylinder 1.
3. If no signal is detected, inspect the wiring and connectors for damage.
4. If the injector is faulty, remove it from the fuel rail and replace it with a new one (OEM recommended).
5. Ensure all connections are secure and free of leaks.

4. Perform Compression Test

1. Remove the spark plug again from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for several seconds and note the pressure reading.
4. Compare the reading to manufacturer specifications (typically 120-175 psi).
5. If the compression is low, further diagnosis is needed for potential internal engine issues.