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

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

549 words

Problem Statement

Learn how to diagnose and fix poor fuel economy in Ford F-150 13th Generation (2015-2020). 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 engine to cool before opening the oil drain plug

Symptoms

•Check engine light illuminated
•Decreased mileage per gallon (MPG)
•Rough engine idle
•Unusual engine noises (knocking or pinging)
•Increased emissions
•Fuel odor near the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Check tire pressure and ensure they are inflated to the manufacturer’s specifications
3
Inspect the air filter for clogs or excessive dirt that could restrict airflow to the engine
4
Evaluate the fuel system for leaks or blockages, including fuel injectors and fuel filter
5
Assess the condition of the spark plugs for wear or fouling
6
Check the engine oil level and quality

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
•Fuel injector cleaning kit
•Oil drain pan

Parts Required

•Air filter
•Spark plugs
•Fuel injectors (if necessary)
•Engine oil and oil filter

Related Faults

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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 tire pressure and ensure they are inflated to the manufacturer’s specifications
3
Inspect the air filter for clogs or excessive dirt that could restrict airflow to the engine
4
Evaluate the fuel system for leaks or blockages, including fuel injectors and fuel filter
5
Assess the condition of the spark plugs for wear or fouling
6
Check the engine oil level and quality

Solution

1. Preparation

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

2. Replace the Air Filter

Locate the air filter housing.
Remove the screws or clips holding the housing in place.
Take out the old air filter and inspect for debris.
Install the new air filter, ensuring it fits snugly.
Re-secure the housing.

3. Inspect and Replace Spark Plugs

Remove the ignition coil connectors.
Unscrew the ignition coils and set them aside.
Use a spark plug socket to remove old spark plugs.
Inspect the gap of new spark plugs and adjust to manufacturer specifications.
Install new spark plugs and reattach ignition coils.

4. Clean or Replace Fuel Injectors

If cleaning, use a fuel injector cleaning kit.
Disconnect the fuel lines and electrical connectors from the injectors.
Remove the fuel rail to access the injectors.
Clean using the kit or replace with new injectors if heavily clogged.

5. Change Engine Oil

Drain old engine oil using an oil drain pan.
Replace the oil filter with a new one.
Add new engine oil that meets the manufacturer’s specifications.