how to diagnose Ford Explorer Fifth Generation (2011-2019) rough idle problems

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

576 words

Problem Statement

Learn how to diagnose and fix rough idle problems in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms and solutions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Relieve fuel pressure before servicing the fuel system.
•Allow engine to cool before opening any components.

Symptoms

•Check engine light illuminated
•Engine vibrations felt while stationary
•Poor acceleration response
•Increased fuel consumption
•Unusual engine noises (e.g., knocking or pinging)
•Engine stalling at idle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs).
2
Inspect the air intake system for clogs or leaks (e.g., vacuum leaks, dirty air filter).
3
Check the condition of spark plugs and ignition coils for wear or damage.
4
Test fuel pressure to ensure the fuel pump and filter are functioning properly.
5
Examine the throttle body for carbon buildup and proper operation.
6
Use a multimeter to test the readings of the engine coolant temperature sensor.

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
•Throttle body cleaner
•Soft brush
•Multimeter

Parts Required

•Spark plugs
•Throttle body gasket (if removed)
•Fuel filter
•Air filter

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs).
2
Inspect the air intake system for clogs or leaks (e.g., vacuum leaks, dirty air filter).
3
Check the condition of spark plugs and ignition coils for wear or damage.
4
Test fuel pressure to ensure the fuel pump and filter are functioning properly.
5
Examine the throttle body for carbon buildup and proper operation.
6
Use a multimeter to test the readings of the engine coolant temperature sensor.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety during the work.
Allow the engine to cool down before starting any repairs.

2. Inspect and Replace Spark Plugs

Remove the engine cover if necessary.
Disconnect the ignition coils from the spark plugs.
Use a spark plug socket to remove the spark plugs.
Inspect the spark plugs for wear or carbon buildup; replace if necessary.
Gap new spark plugs according to manufacturer specifications (usually around 0.044 inches).
Reinstall the spark plugs and reconnect the ignition coils.

3. Clean or Replace Throttle Body

Remove the air intake duct from the throttle body.
Use throttle body cleaner and a soft brush to clean the inside of the throttle body.
Inspect the throttle position sensor (TPS) for proper function; replace if faulty.
Reconnect the air intake duct securely.

4. Check and Replace Fuel Filter (if necessary)

Locate the fuel filter (typically along the fuel line).
Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
Disconnect the fuel lines from the filter using appropriate line wrenches.
Replace the fuel filter with a new one, ensuring proper orientation.
Reconnect the fuel lines and replace the fuse.

5. Inspect and Repair Air Intake System

Check the air filter; replace if dirty.
Inspect all vacuum hoses for cracks or disconnections and replace as needed.
Ensure that the mass airflow sensor (MAF) is clean; if dirty, clean it with MAF cleaner.