how to fix P0302 misfire code in Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if applicable.
• Use the spark plug socket to carefully remove the spark plug from cylinder 2.
• Inspect the old spark plug for signs of fouling or damage.
• Install the new spark plug by hand to avoid cross-threading, then tighten to the manufacturer-specified torque (usually around 13-15 lb-ft).

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove the mounting bolts for the ignition coil using the socket set.
• Carefully pull the ignition coil out and replace it with a new one.
• Secure the new ignition coil with the mounting bolts, tightening to the manufacturer-specified torque (usually around 7-9 lb-ft).
• Reconnect the electrical connector.

4. Test Fuel Injector

• Tools Required: Noid light or multimeter
• Disconnect the fuel injector connector for cylinder 2.
• Connect the noid light to the injector connector and crank the engine to check for signal.
• If no signal is present, test the connector for voltage with a multimeter. Repair as necessary.
• If the injector is faulty, remove it and replace it with a new one, ensuring proper sealing and connection.

5. Compression Test

• Tools Required: Compression gauge
• Remove the spark plug from cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine and read the compression value; it should meet manufacturer specifications.
• If compression is low, further investigation into potential internal engine problems is required.