how to troubleshoot Ford Explorer Fifth Generation (2011-2019) engine misfires?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

640 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to troubleshoot engine misfires in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening any component.

Symptoms

•Check engine light illuminated
•Rough idle or hesitation during acceleration
•Decreased fuel economy
•Engine stalling or loss of power
•Increased exhaust emissions

Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to retrieve any stored error codes.
2
Inspect the ignition system components, including spark plugs and ignition coils, for wear or damage.
3
Check fuel system pressure with a fuel pressure gauge to ensure the fuel pump is delivering the correct amount of fuel.
4
Inspect the air intake system for any blockages or leaks, particularly around the mass airflow sensor.
5
Perform a compression test on each cylinder to check for mechanical issues such as a blown head gasket or valve problems.
6
Verify that the engine is receiving the correct amount of air and fuel by checking the fuel injectors for proper operation.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Spark plug socket
•Fuel pressure gauge
•Compression tester
•Vacuum gauge

Parts Required

•Spark plugs
•Ignition coils
•Fuel filter
•Fuel injectors (if necessary)
•Air filter

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Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to retrieve any stored error codes.
2
Inspect the ignition system components, including spark plugs and ignition coils, for wear or damage.
3
Check fuel system pressure with a fuel pressure gauge to ensure the fuel pump is delivering the correct amount of fuel.
4
Inspect the air intake system for any blockages or leaks, particularly around the mass airflow sensor.
5
Perform a compression test on each cylinder to check for mechanical issues such as a blown head gasket or valve problems.
6
Verify that the engine is receiving the correct amount of air and fuel by checking the fuel injectors for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the negative battery cable to avoid electrical shorts.

2. Inspect and Replace Ignition Components

Tools Required: Socket set, torque wrench, spark plug socket
Remove the ignition coil assemblies by unscrewing the bolts and unplugging the electrical connectors.
Inspect the spark plugs for wear, carbon buildup, or damage; replace if necessary.
- Torque new spark plugs to manufacturer specifications (typically around 13-15 lb-ft).
Install new ignition coils if any are found defective; torque to specifications (usually around 10-12 lb-ft).

3. Check and Replace Fuel System Components

Tools Required: Fuel pressure gauge, wrench set
Connect the fuel pressure gauge to the fuel rail and turn the ignition on (do not start the engine) to check fuel pressure.
- Verify that fuel pressure matches manufacturer specifications (usually around 50-60 psi).
If pressure is low, inspect and replace the fuel filter if clogged, and check the fuel pump operation.
Ensure fuel injectors are clean; consider using a fuel injector cleaner or replacing if necessary.

4. Air Intake and Vacuum Leaks

Tools Required: Vacuum gauge, hose clamps
Inspect air intake ducts and hoses for cracks or disconnections; repair or replace as needed.
Check the mass airflow sensor (MAF) for cleanliness; clean with MAF cleaner if dirty.
Use a vacuum gauge to check for vacuum leaks; repair any found.

5. Compression Test

Tools Required: Compression tester
Remove all spark plugs and insert the compression tester into the first cylinder.
Crank the engine for a few seconds and record the reading; repeat for each cylinder.
Compare readings to manufacturer specifications (typically around 120-180 psi). Replace engine components if readings are low.