how do I fix the P0302 misfire code on my Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool before beginning work.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap gauge.
• Remove the ignition coil from cylinder 2 by unscrewing the bolts and gently lifting it off.
• Use a socket to remove the spark plug and inspect it for wear or fouling.
• If necessary, replace the spark plug with a new one, ensuring the gap is set according to manufacturer specifications (typically 0.050 inches).
• Reinstall the ignition coil, securing it with the bolts and reconnecting the connector.

3. Test and Replace Ignition Coil (if necessary)

• If swapping the ignition coil did not resolve the misfire, replace the ignition coil on cylinder 2.
• Tools Required: Socket set, torque wrench.
• Disconnect the ignition coil connector and unbolt the coil from the engine.
• Install the new ignition coil, ensuring it is seated correctly, and reconnect the connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, O-rings.
• Disconnect the fuel injector connector and remove the fuel injector from cylinder 2.
• Clean the injector using a fuel injector cleaner.
• Inspect the O-rings for signs of wear; replace if necessary.
• Reinstall the cleaned or new injector securely.

5. Check Compression

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 2 and insert the compression gauge into the spark plug hole.
• Crank the engine several times to obtain a compression reading.
• Compare the reading against manufacturer specifications; if low, further investigation of internal engine components may be needed.