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

Solution

1. Preparation

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

2. Replace Faulty Spark Plugs

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connectors.
3. Using a socket wrench, remove the ignition coils from the spark plugs.
4. Remove the old spark plugs using a spark plug socket.
5. Install new spark plugs, tightening to the manufacturer's specified torque (typically around 13-15 lb-ft).
6. Reinstall ignition coils and reconnect the connectors.

3. Inspect and Replace Ignition Coils

1. Check the resistance of each ignition coil using a multimeter (consult specifications for resistance values).
2. Replace any faulty ignition coils by removing the screws or bolts securing them.
3. Ensure proper seating of new coils and reconnect the electrical connectors.

4. Clean or Replace Fuel Injectors

1. If injectors are clogged, use a fuel injector cleaner or consider ultrasonic cleaning.
2. If faulty, remove the fuel rail and replace the injectors, ensuring O-rings are properly seated.
3. Reattach the fuel rail and ensure all connections are secure.

5. Check Compression in Cylinders

1. Remove spark plugs for the cylinders being tested.
2. Insert a compression tester into the spark plug hole and crank the engine.
3. Record the compression readings; they should be within manufacturer specifications (typically around 150-200 psi).
4. If readings are low, further investigate for valve issues or head gasket failure.