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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the engine cover (if applicable) to access the spark plug.
• Use the socket set to remove the spark plug from cylinder 2.
• Inspect the old spark plug for signs of wear or damage.
• Install the new spark plug, ensuring it is gapped correctly according to the manufacturer's specifications.
• Torque the spark plug to the manufacturer’s specifications.

3. Test and Replace Ignition Coil

• Tools Required: Multimeter, socket set.
• Disconnect the ignition coil connector for cylinder 2.
• Use a multimeter to measure the resistance of the ignition coil. Compare the reading to manufacturer specifications.
• If the coil is faulty, remove it using the socket set and install a new ignition coil.
• Reconnect the ignition coil connector.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel line removal tool, socket set.
• Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel line connected to the injector using the fuel line removal tool.
• Remove the old fuel injector and install the new one, ensuring proper sealing.
• Reconnect the fuel line and fuel injector connector.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine.
• Compare the compression reading to the manufacturer's specifications to determine the health of the cylinder.