how to fix the engine misfire in my Ford Explorer Sixth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts required for repairs.
• Disconnect the battery to prevent electrical shorts.
• Safety goggles and gloves should be worn.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, ignition coil puller.
• Remove the engine cover (if applicable) to access ignition coils.
• Disconnect the electrical connectors from each ignition coil.
• Remove the ignition coils using a socket set. Note torque specifications for reinstallation.
• Inspect spark plugs; if worn or fouled, remove and replace with new plugs according to manufacturer specifications.
• Install new ignition coils, ensuring proper alignment and connection.

3. Check and Repair Fuel System

• Tools Required: Fuel pressure gauge, line wrench.
• Locate the fuel rail and connect the fuel pressure gauge to the service port.
• Turn the ignition to the "On" position (do not start) and check fuel pressure against specifications.
• If pressure is low, inspect the fuel pump, fuel filter, and fuel lines for blockages or damage.
• Replace any faulty components and ensure all connections are secure.

4. Address Air Intake and Vacuum Leaks

• Tools Required: Engine vacuum gauge, basic hand tools.
• Visually inspect the air intake system for cracks or loose connections.
• Use an engine vacuum gauge to detect any vacuum leaks; a low reading can indicate a leak.
• Repair or replace any damaged hoses or components in the intake system.

5. Reassemble and Reconnect

• Reconnect the battery and ensure all tools are removed from the engine bay.
• Start the engine and listen for any unusual sounds; ensure the check engine light is off.