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

526 words

Problem Statement

Learn how to diagnose and fix poor fuel economy in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

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 opening any components.

Symptoms

•Check engine light illuminated
•Reduced miles per gallon (MPG) compared to normal
•Engine stalling or rough idling
•Increased emissions or visible exhaust smoke
•Unusual engine noises, such as knocking or pinging
•Noticeable loss of power during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect air filter for clogs or restrictions; replace if necessary.
3
Check tire pressure and tread condition; inflate or replace tires as required.
4
Examine fuel injectors for clogs or leaks and perform a cleaning if necessary.
5
Inspect the Mass Air Flow (MAF) sensor and clean it with MAF sensor cleaner if dirty.
6
Check for vacuum leaks in the intake system, using a smoke test if necessary.

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
•Torque wrench
•Tire pressure gauge
•Fuel injector cleaning kit
•MAF sensor cleaner

Parts Required

•New air filter
•Fuel injector cleaning solution
•Replacement hoses (if necessary)
•New tires (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect air filter for clogs or restrictions; replace if necessary.
3
Check tire pressure and tread condition; inflate or replace tires as required.
4
Examine fuel injectors for clogs or leaks and perform a cleaning if necessary.
5
Inspect the Mass Air Flow (MAF) sensor and clean it with MAF sensor cleaner if dirty.
6
Check for vacuum leaks in the intake system, using a smoke test if necessary.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery before starting work on electrical components.

2. Replace Air Filter

Locate the air filter housing.
Open the housing clips and remove the old air filter.
Install the new air filter, ensuring it fits snugly.
Reassemble the housing and secure the clips.

3. Clean Fuel Injectors

Use a fuel injector cleaning kit.
Follow the kit instructions to connect to the fuel rail.
Run the cleaning solution through the injectors as per the manufacturer's instructions.

4. Clean MAF Sensor

Locate the MAF sensor in the intake system.
Remove the sensor carefully.
Use MAF cleaner to spray the sensor elements and allow it to dry before reinstallation.

5. Inspect and Repair Vacuum Leaks

Visual inspection of all hoses connected to the intake manifold.
Replace any cracked or damaged hoses.
Use a smoke test to identify hidden leaks in the system.

6. Tire Inspection and Replacement

Check tire pressure using a tire pressure gauge; inflate to the recommended PSI.
Inspect the tire tread for wear; replace tires that are excessively worn.