how to fix P0304 misfire code in my Ford F-150 Fourteenth Generation (2021-present)

• •Check engine light illuminated
• •Rough idle or engine shaking
• •Loss of power during acceleration
• •Decreased fuel economy
• •Engine hesitation or stalling

1. 1Scan the vehicle's OBD-II system using a compatible scanner to confirm the P0304 code and check for any additional codes.
2. 2Inspect the spark plug in cylinder 4 for wear, damage, or fouling.
3. 3Check the ignition coil for cylinder 4 for proper operation and signs of damage.
4. 4Test the fuel injector for cylinder 4 to ensure it is delivering the correct amount of fuel.
5. 5Perform a compression test on cylinder 4 to check for mechanical issues such as a blown head gasket or valve problems.
6. 6Inspect the wiring and connectors related to the ignition system and fuel injector for damage or corrosion.

After completing the repair, verify that the issue has been resolved:

• ✓Test the affected component to ensure it functions correctly
• ✓Check for any error codes or warning lights
• ✓Monitor the vehicle for a few days to ensure the issue does not recur

To prevent this issue from occurring again:

• •Follow the manufacturer's recommended maintenance schedule
• •Address warning signs early before they develop into major issues
• •Use quality parts and fluids recommended for your vehicle
• •Keep detailed records of all repairs and maintenance

• •OBD-II scanner
• •Ratchet
• •Socket set
• •Torque wrench
• •Spark plug socket
• •Compression tester

• •Spark plug
• •Ignition coil (if needed)
• •Fuel injector (if needed)