why does my Ford F-150 13th Generation (2015-2020) have poor fuel economy

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

601 words

Problem Statement

Discover how to diagnose and fix poor fuel economy issues in Ford F-150 13th Generation (2015-2020). Step-by-step guide with symptoms and solutions.

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 starting any repairs to avoid burns.

Symptoms

•Check engine light illuminated
•Decreased miles per gallon (MPG)
•Rough engine idle
•Engine stalling at low speeds
•Increased emissions from exhaust
•Unusual engine noises (knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect air filter for dirt and clogging; replace if necessary.
3
Check tire pressure and tread wear; ensure tires are inflated to manufacturer specifications.
4
Inspect fuel system for leaks or clogs, including fuel injectors and fuel filter.
5
Evaluate the condition of the spark plugs and ignition system; replace worn plugs or components.
6
Check for exhaust leaks or issues with the catalytic converter.

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
•Tire pressure gauge
•Fuel injector cleaning kit
•Torque wrench

Parts Required

•Air filter
•Spark plugs
•Fuel injector cleaner

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect air filter for dirt and clogging; replace if necessary.
3
Check tire pressure and tread wear; ensure tires are inflated to manufacturer specifications.
4
Inspect fuel system for leaks or clogs, including fuel injectors and fuel filter.
5
Evaluate the condition of the spark plugs and ignition system; replace worn plugs or components.
6
Check for exhaust leaks or issues with the catalytic converter.

Solution

1. Preparation

Gather all necessary tools and parts before starting the repair.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Air Filter

Locate the air filter housing, typically near the engine air intake.
Undo the clips or screws securing the housing.
Remove the old air filter and inspect the housing for debris.
Insert a new air filter, ensuring it fits snugly.
Reassemble the housing and secure it with clips or screws.

3. Inspect and Adjust Tire Pressure

Use a tire pressure gauge to check the pressure of all tires.
Inflate tires to the recommended PSI found on the driver’s side door jamb label.
Inspect tires for uneven wear; rotate or replace if necessary.

4. Clean Fuel Injectors

Use a fuel injector cleaning kit as per manufacturer instructions.
Disconnect the fuel line and attach the cleaning kit to the fuel rail.
Follow the instructions to clean the injectors; run the engine to ensure the cleaner circulates.

5. Replace Spark Plugs

Remove the engine cover if applicable to access the spark plugs.
Using a socket wrench, carefully unscrew the old spark plugs.
Inspect the old plugs for wear; replace with new plugs of the same specifications.
Torque the new plugs to the manufacturer’s recommended specification (often around 13-20 lb-ft).
Reinstall the engine cover if removed.

6. Check Exhaust System

Visually inspect the exhaust system for any signs of leaks or damage.
If a leak is found, replace the damaged section of the exhaust pipe or muffler.
If the catalytic converter is suspected to be clogged, consider professional cleaning or replacement.