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

499 words

Problem Statement

Discover how to diagnose and fix poor fuel economy in the 2011-2019 Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on fuel systems to prevent ignition.
•Allow engine to cool before inspecting any components.

Symptoms

•Check engine light illuminated
•Decreased miles per gallon (MPG)
•Rough idle or engine misfires
•Unusual engine noises
•Increased emissions
•Smell of fuel around the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check tire pressure and condition to ensure they are within manufacturer specifications.
3
Inspect the air filter for dirt or blockages that could restrict airflow.
4
Test the fuel pressure to determine if the fuel pump is functioning correctly.
5
Inspect the fuel injectors for clogs or leaks.
6
Check 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
•Tire pressure gauge
•Socket set
•Fuel injector cleaning kit
•Vacuum gauge

Parts Required

•New air filter
•Fuel injector cleaning kit (if applicable)
•Replacement vacuum hoses (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 to ensure they are within manufacturer specifications.
3
Inspect the air filter for dirt or blockages that could restrict airflow.
4
Test the fuel pressure to determine if the fuel pump is functioning correctly.
5
Inspect the fuel injectors for clogs or leaks.
6
Check for vacuum leaks in the intake system that could affect air-fuel mixture.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Air Filter

Locate the air filter housing.
Unclip or unscrew the housing cover.
Remove the old air filter and clean the housing.
Install the new air filter ensuring a proper seal.
Reassemble the housing cover securely.

3. Inspect and Clean Fuel Injectors

Remove the fuel rail by unscrewing the bolts and disconnecting the fuel lines.
Carefully extract the fuel injectors from the rail.
Use a fuel injector cleaning kit or ultrasonic cleaner to clean the injectors.
Reinstall the cleaned injectors and the fuel rail, ensuring all connections are tight.

4. Check and Repair Vacuum Leaks

Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
Replace any damaged hoses.
Use a smoke machine or carburetor cleaner to identify leaks around the intake manifold.

5. Tire Pressure Adjustment

Check the tire pressure using a tire pressure gauge.
Inflate tires to the recommended pressure listed in the owner’s manual.
Inspect tires for uneven wear which may indicate alignment issues.