why is my Ford Explorer Fifth Generation (2011-2019) using too much fuel?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

584 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 diagnose and fix excessive fuel consumption 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 any maintenance.

Symptoms

•Check engine light illuminated
•Rough idle or engine hesitation
•Decreased acceleration response
•Unusual fuel smell or leaking fuel
•Poor fuel economy readings on the dashboard
•Increased emissions during vehicle operation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Check fuel pressure using a fuel pressure gauge to ensure the fuel system is functioning correctly.
3
Inspect the air filter for clogs or damage that could restrict airflow.
4
Examine the fuel injectors for leaks or blockages.
5
Check the mass airflow sensor (MAF) for proper operation and cleanliness.
6
Inspect for vacuum leaks in the intake system that could affect air-fuel mixture.

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
•Fuel pressure gauge
•Socket set
•Screwdrivers
•Mass airflow sensor cleaner
•Vacuum gauge

Parts Required

•Air filter
•Fuel injectors (if cleaning fails)
•Vacuum hoses (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Check fuel pressure using a fuel pressure gauge to ensure the fuel system is functioning correctly.
3
Inspect the air filter for clogs or damage that could restrict airflow.
4
Examine the fuel injectors for leaks or blockages.
5
Check the mass airflow sensor (MAF) for proper operation and cleanliness.
6
Inspect for vacuum leaks in the intake system that could affect air-fuel mixture.

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is turned off.
Disconnect the negative battery cable to prevent electrical shorts.

2. Inspect and Replace Air Filter

Remove the air filter housing cover using a socket set.
Take out the old air filter and inspect for dirt and damage.
Install a new air filter that meets OEM specifications.
Reattach the air filter housing cover and tighten securely.

3. Clean or Replace Mass Airflow Sensor (MAF)

Locate the MAF sensor in the intake duct.
Disconnect the electrical connector and carefully remove the sensor.
Use MAF cleaner to spray the sensor elements; avoid touching them.
Allow the sensor to dry, then reinstall it and reconnect the electrical connector.

4. Check and Clean Fuel Injectors

Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
Remove the fuel rail to access the fuel injectors.
Clean the injectors using a fuel injector cleaner or replace them if damaged.
Reinstall the fuel rail and ensure all connections are secure.

5. Inspect for Vacuum Leaks

Use a smoke machine or a can of carburetor cleaner to check for vacuum leaks around hoses and the intake manifold.
Replace any damaged vacuum hoses and tighten any loose connections.

6. Verify Fuel Pressure

Reinstall the fuel pump fuse and connect the fuel pressure gauge to the fuel rail.
Start the engine and check the fuel pressure against manufacturer specifications.
If pressure is low, consider replacing the fuel pump or fuel filter.