how to troubleshoot Ford Explorer Sixth Generation (2020-present) engine misfire

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect Ignition System

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if necessary.
• Remove the ignition coils from the affected cylinders.
  • Unplug the electrical connectors.
  • Remove the bolts securing the coils using a socket wrench.
• Inspect each spark plug.
  • Check for signs of wear, cracks, or carbon buildup.
  • Replace any damaged spark plugs with new ones, ensuring proper gap settings.
• Reinstall ignition coils and secure them with bolts, ensuring they are torqued to the manufacturer's specifications.

3. Check Fuel System

• Tools Required: Fuel pressure gauge, injector cleaning kit.
• Attach the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "On" position (do not start) to check fuel pressure against specifications.
• If pressure is low, inspect the fuel pump and fuel filter for blockages or failures.
• If fuel injectors are suspected, perform an injector cleaning procedure or replace faulty injectors.

4. Inspect Air Intake and Vacuum Hoses

• Tools Required: Visual inspection tools, vacuum gauge.
• Inspect the air intake system for any blockages or damage.
• Check all vacuum hoses for cracks, disconnections, or leaks.
• Use a vacuum gauge to check for proper manifold vacuum levels.

5. Compression Test

• Tools Required: Compression tester.
• Remove spark plugs from the affected cylinders.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression readings.
• Compare readings against manufacturer specifications. Low readings may indicate internal engine issues.