how to diagnose why my Ford Explorer Fifth Generation (2011-2019) has poor fuel economy

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

602 words

Problem Statement

Learn how to diagnose and fix poor fuel economy issues in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Fuel System

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 inspecting or repairing the exhaust system.

Symptoms

•Check engine light illuminated
•Decreased miles per gallon (MPG)
•Engine stalling or rough idling
•Poor acceleration or sluggish performance
•Unusual engine noise or vibration
•Noticeable increase in exhaust emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check tire pressure and condition, ensuring they meet manufacturer specifications.
3
Inspect the air filter for clogs or excessive dirt that could restrict airflow.
4
Assess fuel quality and check for water or contaminants in the fuel system.
5
Review and test the fuel injectors for proper operation and any signs of blockage.
6
Perform a visual inspection of the exhaust system for leaks or damage.
7
Measure the fuel pressure with a fuel pressure gauge to ensure it meets specifications.

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
•Fuel injector removal tool
•Tire pressure gauge
•Torque wrench
•Air compressor

Parts Required

•New air filter
•Fuel injector cleaning solution or new injectors
•Exhaust gaskets or sealing compound
•Tires (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check tire pressure and condition, ensuring they meet manufacturer specifications.
3
Inspect the air filter for clogs or excessive dirt that could restrict airflow.
4
Assess fuel quality and check for water or contaminants in the fuel system.
5
Review and test the fuel injectors for proper operation and any signs of blockage.
6
Perform a visual inspection of the exhaust system for leaks or damage.
7
Measure the fuel pressure with a fuel pressure gauge to ensure it meets specifications.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Replace Air Filter

Remove the air filter housing cover using a socket set.
Take out the old air filter and inspect the housing for dirt.
Install a new air filter, ensuring it fits snugly, and reattach the housing cover.
Tools Required: Socket set, new air filter.

3. Clean or Replace Fuel Injectors

If injectors are clogged, remove them according to the manufacturer's specifications.
Soak the injectors in a cleaning solution or use a fuel injector cleaner if they are not severely clogged.
Reinstall the injectors, ensuring proper seals are in place.
Tools Required: Fuel injector removal tool, cleaning solution, torque wrench.

4. Inspect and Repair Exhaust System

Visually inspect the exhaust system for any signs of leaks or damage.
If leaks are found, replace the affected sections or components (e.g., gaskets, pipes).
Tools Required: Socket set, exhaust sealing compound or gaskets.

5. Check Tire Pressure and Condition

Use a tire pressure gauge to check the pressure of all tires.
Inflate or deflate tires to recommended specifications found in the owner’s manual.
Inspect tires for uneven wear and replace if necessary.
Tools Required: Tire pressure gauge, air compressor.