how to diagnose a rough idle in Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather necessary tools and ensure the vehicle is parked on a flat surface.
• Disconnect the battery to ensure safety while working on electrical components.

2. Address Spark Plugs and Ignition Coils

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the electrical connectors from the ignition coils.
  3. Remove the ignition coils using a socket set.
  4. Inspect and replace any damaged spark plugs with OEM recommended plugs.
  5. Reinstall ignition coils and reconnect electrical connectors.

3. Clean the Throttle Body

• Sub-steps:
  1. Remove the air intake duct connected to the throttle body.
  2. Use throttle body cleaner and a soft cloth to clean the inside of the throttle body.
  3. Ensure the throttle plate moves freely and reassemble the intake duct.

4. Inspect the Fuel System

• Sub-steps:
  1. Check the fuel filter and replace if clogged.
  2. Use a fuel pressure gauge to test fuel pump pressure; ensure it meets manufacturer specifications.
  3. Remove and clean or replace fuel injectors as needed.

5. Repair Vacuum Leaks

• Sub-steps:
  1. Inspect all vacuum lines for cracks or disconnections.
  2. Replace any damaged hoses with OEM equivalent parts.
  3. Use a smoke machine to identify any hidden leaks.