how to fix engine misfire in Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

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

2. Replace Spark Plugs

• Remove the ignition coil by unbolting it and disconnecting the electrical connector.
• Extract the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug gap and condition; replace with OEM or equivalent spark plugs.
• Torque the new spark plugs to the manufacturer's specifications (typically around 13 lb-ft).

3. Test and Replace Ignition Coils (if necessary)

• Use a multimeter to check the primary and secondary resistance of the ignition coil against specifications.
• If faulty, remove the ignition coil and replace it with a new one.
• Ensure proper seating and reconnect the electrical connector securely.

4. Clean or Replace Fuel Injectors

• If a clog is suspected, use a fuel injector cleaning kit to clean the injectors.
• If cleaning does not resolve the issue, replace the fuel injector with a compatible part.
• Reconnect the fuel rail and ensure no leaks occur.

5. Inspect and Repair Vacuum Leaks

• Visually inspect hoses and connections in the intake system.
• Use smoke testing if necessary to identify hidden leaks.
• Replace any damaged hoses or fittings.

6. Perform Compression Test (if internal issues are suspected)

• Remove the spark plugs and disable the fuel system to prevent fuel injection during testing.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression readings for each cylinder; compare against manufacturer specifications.
• Address any cylinders with low compression (possible causes include valve issues or head gasket failure).