how to handle a P0302 code in my Ford F-150?

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the engine cover if necessary.
• Remove the spark plug wire or ignition coil from cylinder 2.
• Use a spark plug socket to remove the spark plug.
• Inspect the spark plug for signs of wear (e.g., carbon buildup, cracking).
• Replace with a new spark plug that meets the manufacturer's specifications (check gap).
• Reinstall the spark plug and reconnect the ignition coil or spark plug wire.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, proceed to inspect the ignition coil.
• Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Test the ignition coil with a multimeter to ensure it is within the specified resistance range.
• If defective, replace the ignition coil with a new one and reconnect it.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector from cylinder 2.
• Remove the fuel injector using a socket set.
• Inspect the injector for clogs or damage.
• Clean the injector using a fuel injector cleaner or replace with a new one if necessary.
• Reinstall the injector and reconnect the electrical connector.

5. Compression Test

• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading and compare it to the manufacturer's specifications.
• If the reading is low, further investigation for possible internal engine issues may be required.