why does my Ford Explorer Fifth Generation (2011-2019) have poor fuel economy?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

578 words

Problem Statement

Learn how to diagnose and fix poor fuel economy issues in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, 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 components.
•Allow the engine to cool before performing maintenance to avoid burns.

Symptoms

•Check engine light illuminated
•Rough idle
•Decreased acceleration performance
•Unusual exhaust odor (e.g., strong fuel smell)
•Increased frequency of refueling
•Poor performance under load (e.g., when carrying heavy cargo)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any faults in the engine management system.
2
Check tire pressure and tread condition; under-inflated or worn tires can affect fuel efficiency.
3
Inspect the air filter for clogs or restrictions; a dirty air filter can reduce airflow to the engine.
4
Assess fuel system components, including the fuel injectors and fuel pump, for proper operation and leaks.
5
Evaluate the exhaust system for blockages, such as a clogged catalytic converter, that may hinder engine performance.
6
Test the Mass Air Flow (MAF) sensor and throttle position sensor for accurate readings and functionality.

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
•Screwdriver
•Tire pressure gauge
•Fuel injector cleaner
•MAF sensor cleaner
•Air compressor

Parts Required

•Replacement air filter
•Fuel injector cleaning kit

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any faults in the engine management system.
2
Check tire pressure and tread condition; under-inflated or worn tires can affect fuel efficiency.
3
Inspect the air filter for clogs or restrictions; a dirty air filter can reduce airflow to the engine.
4
Assess fuel system components, including the fuel injectors and fuel pump, for proper operation and leaks.
5
Evaluate the exhaust system for blockages, such as a clogged catalytic converter, that may hinder engine performance.
6
Test the Mass Air Flow (MAF) sensor and throttle position sensor for accurate readings and functionality.

Solution

1. Preparation

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

2. Replace Air Filter

Tools Required: Screwdriver, replacement air filter.
Remove the air intake cover using a screwdriver.
Take out the old air filter, inspecting the housing for dirt or debris.
Install the new air filter, ensuring it sits properly in the housing.
Reattach the air intake cover securely.

3. Clean the Fuel Injectors

Tools Required: Fuel injector cleaner, injector cleaning kit.
Disconnect the fuel pump relay to prevent fuel from circulating.
Use an injector cleaning kit to apply cleaner through the fuel rail.
Follow manufacturer’s instructions for the specific cleaner being used.
Reconnect the fuel pump relay once cleaning is complete.

4. Inspect and Clean MAF Sensor

Tools Required: MAF sensor cleaner.
Locate the MAF sensor in the air intake duct.
Remove the sensor carefully to avoid damaging it.
Spray MAF cleaner on the sensor elements and allow it to dry before reinstalling.
Reinstall the MAF sensor, ensuring all connections are secure.

5. Tire Maintenance

Tools Required: Tire pressure gauge, air compressor.
Check the tire pressure using a tire pressure gauge; adjust to manufacturer-recommended levels if necessary.
Inspect the tread for excessive wear; replace tires if needed to ensure optimal contact with the road.