how to diagnose a P0301 code on my Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting any work.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if necessary.
• Locate cylinder 1 ignition coil and spark plug.
• Sub-steps:
  1. Unplug the electrical connector from the ignition coil.
  2. Remove the ignition coil bolt and take out the coil.
  3. Remove the spark plug using a spark plug socket; inspect for wear or carbon buildup.
  4. Replace the spark plug with a new one, ensuring it is gapped correctly to manufacturer specifications.
  5. Reinstall the ignition coil and secure it with the bolt, reconnecting the electrical connector.

3. Check and Replace Fuel Injector

• Tools Required: Noid light, fuel injector removal tool
• Sub-steps:
  1. Disconnect the fuel injector wiring harness.
  2. Use a noid light to check for proper signal to the injector while cranking the engine.
  3. If the signal is present, remove the fuel injector using the removal tool.
  4. Inspect the injector for clogs and replace if necessary.
  5. Reinstall the injector and secure the harness.

4. Perform Compression Test

• Tools Required: Compression tester
• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the maximum pressure reading.
  4. Compare the reading to the manufacturer's specifications; if low, further engine diagnostics may be needed.

5. Inspect for Vacuum Leaks

• Tools Required: Smoke machine or carb cleaner
• Sub-steps:
  1. Visually inspect vacuum lines for cracks or disconnections.
  2. Use a smoke machine to check for leaks around the intake manifold and connections.
  3. If leaks are found, replace the affected hoses or gaskets.