my Ford Explorer is using too much fuel, what should I check

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

518 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 battery before working on electrical systems.
•Allow engine to cool before performing any inspections or repairs.

Symptoms

•Check engine light illuminated
•Rough idle
•Decreased acceleration performance
•Strong fuel odor
•Poor fuel economy
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any engine-related issues.
2
Inspect air filter for clogs or restrictions that could affect airflow.
3
Check fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.
4
Examine the fuel injectors for leaks or malfunctions.
5
Inspect the exhaust system for blockages or leaks that could influence engine performance.
6
Verify the correct operation of the mass airflow sensor (MAF) and throttle position sensor (TPS).

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 pressure gauge
•Line disconnect tool
•Screwdriver set

Parts Required

•Air filter
•Fuel injectors (if malfunctioning)
•MAF sensor (if faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any engine-related issues.
2
Inspect air filter for clogs or restrictions that could affect airflow.
3
Check fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.
4
Examine the fuel injectors for leaks or malfunctions.
5
Inspect the exhaust system for blockages or leaks that could influence engine performance.
6
Verify the correct operation of the mass airflow sensor (MAF) and throttle position sensor (TPS).

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 to prevent electrical shorts.

2. Replace Air Filter

Remove the air filter housing cover by unscrewing the necessary fasteners.
Take out the old air filter and inspect it for dirt or damage.
Install a new air filter, ensuring it fits snugly into the housing.
Reassemble the air filter housing cover and tighten screws.

3. Test and Replace Fuel Injectors (if necessary)

Disconnect the fuel lines from the injectors using a line disconnect tool, taking precautions to catch any fuel spillage.
Remove the fuel injectors from the engine rail.
Inspect injectors for clogs or leaks; clean or replace as needed.
Reinstall the fuel injectors and reconnect the fuel lines securely.

4. Check and Replace MAF Sensor (if applicable)

Locate the MAF sensor in the intake system.
Disconnect the electrical connector and remove the sensor from its housing.
Clean the sensor with MAF cleaner to remove any deposits.
Reinstall the MAF sensor, ensuring a secure fit, and reconnect the electrical connector.

5. Inspect and Repair Exhaust System

Visually check the exhaust system for any visible damage or leaks.
If damage is found, replace the affected components (pipes, catalytic converter, muffler) as needed.
Ensure all connections are tight and secure to prevent exhaust leaks.