why does my Ford Explorer Fifth Generation (2011-2019) have poor fuel economy lately

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

652 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, diagnostics, and repairs.

Affected Component

Fuel System

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 opening any components

Symptoms

•Check engine light illuminated
•Noticeable decrease in miles per gallon (MPG)
•Engine stalling or hesitation during acceleration
•Rough idle or engine misfire
•Unusual engine noises or vibrations
•Increased exhaust emissions (black smoke)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Check the air filter for clogs or dirt that may restrict airflow to the engine
3
Inspect fuel injectors for proper function and any signs of clogging or leaks
4
Verify tire pressure and condition; under-inflated or worn tires can negatively impact fuel economy
5
Examine the fuel system for leaks, including fuel lines, fuel pump, and fuel filter
6
Assess engine oil quality and level; old or incorrect oil can increase friction and reduce 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
•Screwdriver set
•Fuel line wrench
•Tire pressure gauge
•Oil filter wrench
•Oil catch pan

Parts Required

•New air filter
•Fuel injectors (if cleaning is not sufficient)
•Engine oil (check owner's manual for specifications)
•Oil filter

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Check the air filter for clogs or dirt that may restrict airflow to the engine
3
Inspect fuel injectors for proper function and any signs of clogging or leaks
4
Verify tire pressure and condition; under-inflated or worn tires can negatively impact fuel economy
5
Examine the fuel system for leaks, including fuel lines, fuel pump, and fuel filter
6
Assess engine oil quality and level; old or incorrect oil can increase friction and reduce efficiency

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the negative terminal of the battery to ensure safety.
Allow the engine to cool before starting any work.

2. Replace Air Filter

Locate the air filter housing.
Remove the screws or clips securing the housing.
Take out the old air filter and clean the housing with a damp cloth.
Install a new air filter, ensuring it fits snugly, and reassemble the housing.
Tools required: Screwdriver set, new air filter.

3. Clean or Replace Fuel Injectors

Access the fuel rail by removing any components obstructing it (e.g., engine cover).
Disconnect the fuel lines and electrical connections from the fuel injectors.
Remove the injectors from the fuel rail, taking care not to damage the O-rings.
Clean the injectors using a specialized cleaner or replace them if they are clogged or faulty.
Reinstall the injectors, ensuring proper alignment and sealing.
Tools required: Fuel line wrench, injector puller (if necessary), cleaning kit or new injectors.

4. Check Tire Pressure and Condition

Use a tire pressure gauge to check each tire's pressure, referring to the manufacturer's specifications.
Inflate tires to the recommended pressure if they are low.
Inspect tires for uneven wear or damage; replace if necessary.
Tools required: Tire pressure gauge, air compressor.

5. Inspect and Change Engine Oil

Check the engine oil level with the dipstick; add oil if low.
If the oil is dirty or hasn't been changed per the maintenance schedule, drain the old oil using a wrench to remove the oil pan bolt.
Replace the oil filter and refill the engine with the appropriate type of oil.
Tools required: Wrench set, oil filter wrench, oil catch pan, new oil filter, and oil.