why is my Ford Explorer using too much fuel

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

616 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. 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 components.
•Allow the engine to cool before inspecting any engine components.

Symptoms

•Check engine light illuminated
•Decreased fuel economy
•Rough engine idle
•Unusual engine noises
•Increased exhaust emissions
•Strong fuel odor

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to fuel system or engine performance.
2
Check the fuel pressure using a fuel pressure gauge to ensure it is within the manufacturer’s specifications.
3
Inspect air filter for clogs or dirt that could restrict airflow to the engine.
4
Examine fuel injectors for leaks or clogs that may affect fuel delivery.
5
Check the Mass Air Flow (MAF) sensor for dirt or malfunctioning readings.
6
Inspect for vacuum leaks in hoses or intake manifold that could lead to incorrect air-fuel mixture.
7
Review tire pressure and condition, as low pressure can affect fuel efficiency.

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
•MAF sensor cleaner
•Vacuum gauge

Parts Required

•Air filter
•MAF sensor (if needed)
•Fuel injectors (if needed)
•Vacuum hoses (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to fuel system or engine performance.
2
Check the fuel pressure using a fuel pressure gauge to ensure it is within the manufacturer’s specifications.
3
Inspect air filter for clogs or dirt that could restrict airflow to the engine.
4
Examine fuel injectors for leaks or clogs that may affect fuel delivery.
5
Check the Mass Air Flow (MAF) sensor for dirt or malfunctioning readings.
6
Inspect for vacuum leaks in hoses or intake manifold that could lead to incorrect air-fuel mixture.
7
Review tire pressure and condition, as low pressure can affect fuel efficiency.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid any electrical issues during the repair.

2. Replace Air Filter

Remove the air filter housing cover using a socket set.
Take out the old air filter and inspect it for dirt and damage.
Install a new air filter, ensuring it fits securely in place.
Reattach the housing cover and torque bolts to manufacturer specifications.

3. Clean or Replace MAF Sensor

Disconnect the MAF sensor wiring harness.
Remove the MAF sensor from the intake duct using a screwdriver.
Clean the sensor using MAF sensor cleaner; if damaged, replace it with a new part.
Reinstall the MAF sensor and reconnect the wiring harness.

4. Inspect and Clean Fuel Injectors

Locate the fuel rail and relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
Disconnect fuel injector wiring and remove the fuel rail using a socket set.
Clean the injectors with a dedicated cleaner or replace them if needed.
Reinstall the fuel rail and reconnect the wiring.

5. Inspect for Vacuum Leaks

Visually inspect all vacuum hoses for cracks or disconnections.
Use a smoke machine or carburetor cleaner to detect leaks while the engine is running.
Replace any damaged hoses and secure all connections.

6. Test Drive and Recheck

Reconnect the battery and start the engine. Allow it to reach operating temperature.
Take the vehicle for a test drive to check for improvements in fuel economy and performance.