why does my Ford Explorer have poor fuel economy lately

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

522 words

Problem Statement

Learn how to diagnose and fix poor fuel economy issues in Ford Explorer. 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 the battery before working on electrical systems.
•Allow the engine to cool before handling any components.

Symptoms

•Reduced miles per gallon (MPG)
•Engine stalling during acceleration
•Check engine light illuminated
•Rough idle or engine misfires
•Unusual exhaust smoke (black or excessive)
•Increased fuel consumption during normal driving conditions

Diagnostic Steps

1
Scan for trouble codes using an OBD-II scanner to identify any engine-related issues.
2
Check tire pressure and condition; under-inflated or worn tires can affect fuel efficiency.
3
Inspect the air filter for clogs or dirt, which can restrict airflow to the engine.
4
Evaluate fuel quality and ensure that the vehicle is using the recommended fuel type.
5
Test the fuel injectors for proper operation and cleanliness.
6
Examine the exhaust system for any blockages or leaks that could affect performance.
7
Review engine oil condition and level; degraded oil can lead to increased friction and poor 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
•Tire pressure gauge
•Screwdriver set
•Oil catch pan
•Fuel injector cleaning kit

Parts Required

•Air filter
•Fuel injectors (if replacement is necessary)
•Engine oil
•Oil filter

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Diagnostic Steps

1
Scan for trouble codes using an OBD-II scanner to identify any engine-related issues.
2
Check tire pressure and condition; under-inflated or worn tires can affect fuel efficiency.
3
Inspect the air filter for clogs or dirt, which can restrict airflow to the engine.
4
Evaluate fuel quality and ensure that the vehicle is using the recommended fuel type.
5
Test the fuel injectors for proper operation and cleanliness.
6
Examine the exhaust system for any blockages or leaks that could affect performance.
7
Review engine oil condition and level; degraded oil can lead to increased friction and poor efficiency.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to ensure safety while working.

2. Inspect and Replace Air Filter

Remove the air filter cover using a screwdriver.
Take out the old air filter and inspect it for dirt or damage.
Install a new air filter, ensuring it fits securely in place.
Reattach the air filter cover.

3. Clean or Replace Fuel Injectors

If injectors are dirty, use a fuel injector cleaning kit; follow the manufacturer’s instructions.
If faulty, remove the fuel injectors by disconnecting the fuel rail and unscrewing them.
Replace with new injectors if cleaning does not resolve the issue.

4. Tire Maintenance

Check the tire pressure using a tire gauge; inflate to the manufacturer’s recommended PSI.
Inspect tires for signs of wear and replace if necessary.

5. Change Engine Oil

Drain the old engine oil using an oil catch pan; remove the oil drain plug.
Replace the oil filter with a new one.
Refill the engine with the recommended grade of oil.