how to fix a P0302 misfire code on my Ford F-150

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.
• Allow the engine to cool if it has been running.

2. Inspect and Replace Spark Plug

• Remove the spark plug wire or ignition coil connector from cylinder 2.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the spark plug for wear or damage; replace it if necessary.
• Torque the new spark plug to the manufacturer’s specification (typically around 13-15 lb-ft).
• Reconnect the spark plug wire or ignition coil.

3. Inspect and Replace Ignition Coil

• Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Inspect the ignition coil for damage or corrosion; replace it if needed.
• Install the new ignition coil and torque the mounting bolts to the manufacturer’s specifications.
• Reconnect the electrical connector.

4. Check and Replace Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel rail if necessary to access the fuel injector.
• Inspect the fuel injector for clogs or damage; replace it if needed.
• Reinstall the fuel injector and reconnect the fuel rail and electrical connector.

5. Verify Compression

• If misfire persists, perform a compression test on cylinder 2.
• If compression is low, further investigation into potential head gasket failure or valve issues may be required.