how to fix the P0301 misfire code on my Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Remove Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect any wiring harness connected to the ignition coil.
  3. Using the spark plug socket, remove the spark plug from cylinder 1.
  4. Inspect the spark plug for signs of wear, fouling, or damage.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• Sub-steps:
  1. If the ignition coil is faulty, remove it from the spark plug.
  2. Install the new ignition coil ensuring it is seated properly.
  3. Reconnect the wiring harness.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, multimeter.
• Sub-steps:
  1. Disconnect the fuel injector connector.
  2. Use a multimeter to check for resistance; replace if out of spec.
  3. If using a fuel pressure gauge, ensure the fuel pressure is within specifications.
  4. Clean or replace the fuel injector as needed.

5. Perform Compression Test

• Tools Required: Compression gauge.
• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression gauge into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare with manufacturer specifications; repair any internal engine issues if compression is low.

6. Reassemble and Test

• Tools Required: Torque wrench.
• Sub-steps:
  1. Reinstall the spark plug and torque to manufacturer specifications (usually around 15-20 lb-ft).
  2. Reconnect the negative battery terminal.
  3. Start the engine and monitor for any misfire codes or symptoms.