my Ford Explorer has poor fuel economy what's causing it

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

500 words

Problem Statement

Learn how to diagnose and fix poor fuel economy issues in Ford Explorer. Step-by-step guide with diagnostic procedures 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.
•Relieve fuel system pressure before servicing fuel components.

Symptoms

•Check engine light illuminated
•Decreased miles per gallon (MPG)
•Engine stalling or rough idling
•Unusual smells from the exhaust
•Increased emissions
•Loss of power during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Check tire pressure and tread condition to ensure they are within specifications.
3
Inspect the air filter for clogs or dirt that could restrict airflow.
4
Examine fuel system components, including fuel injectors and fuel filter, for blockages or failures.
5
Test the throttle position sensor (TPS) and mass airflow sensor (MAF) for proper operation using a multimeter.
6
Assess the condition of spark plugs and ignition components for wear or misfiring.

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
•Multimeter
•Fuel injector cleaning kit (if applicable)

Parts Required

•Air filter
•Fuel injectors (if needed)
•Spark plugs
•Throttle position sensor (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Check tire pressure and tread condition to ensure they are within specifications.
3
Inspect the air filter for clogs or dirt that could restrict airflow.
4
Examine fuel system components, including fuel injectors and fuel filter, for blockages or failures.
5
Test the throttle position sensor (TPS) and mass airflow sensor (MAF) for proper operation using a multimeter.
6
Assess the condition of spark plugs and ignition components for wear or misfiring.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Replace Air Filter

Locate the air filter housing.
Unclip or unscrew the housing cover and remove the old air filter.
Install a new air filter, ensuring it fits snugly and seals properly.
Reattach the housing cover securely.

3. Clean or Replace Fuel Injectors

If cleaning, use a fuel injector cleaner or a specialized ultrasonic cleaning kit.
If replacing, relieve fuel system pressure, disconnect fuel lines, and remove the old injectors.
Install new injectors, ensuring correct alignment and sealing.

4. Inspect and Replace Spark Plugs

Remove the ignition coil or spark plug wires.
Use a spark plug socket to remove old spark plugs.
Check the gap on new spark plugs and install them to the manufacturer's specifications (usually 15-20 ft-lbs torque).
Reinstall ignition coils or wires.

5. Test and Replace Throttle Position Sensor (if faulty)

Disconnect the electrical connector from the TPS.
Remove the TPS from the throttle body.
Install the new TPS, ensuring it aligns properly.
Reconnect the electrical connector and test for proper functionality.