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

3 min read

472 words

Problem Statement

Discover how to diagnose and fix poor fuel economy in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool before performing any maintenance.
•Disconnect the battery before working on electrical systems.

Symptoms

•Check engine light illuminated
•Decreased miles per gallon (MPG)
•Rough engine idle
•Engine stalling during acceleration
•Unusual exhaust smoke
•Increased engine noise

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Inspect tire pressure and tread condition; ensure they are within manufacturer specifications.
3
Check air filter condition for clogs or dirt that might restrict airflow.
4
Test fuel pressure to ensure the fuel system is operating correctly.
5
Evaluate fuel quality; consider if there has been a recent change in fuel supplier.
6
Inspect exhaust system for any blockages or leaks.

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
•Socket set
•Spark plug socket
•Fuel pressure gauge

Parts Required

•Air filter
•Spark plugs
•Fuel system cleaner

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Inspect tire pressure and tread condition; ensure they are within manufacturer specifications.
3
Check air filter condition for clogs or dirt that might restrict airflow.
4
Test fuel pressure to ensure the fuel system is operating correctly.
5
Evaluate fuel quality; consider if there has been a recent change in fuel supplier.
6
Inspect exhaust system for any blockages or leaks.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure vehicle is parked on a flat surface and engage the parking brake.

2. Replace Air Filter

Locate the air filter housing.
Release the clips or screws to open the housing.
Remove the old air filter and replace it with a new one.
Re-secure the housing.

3. Inspect and Replace Spark Plugs

Remove the engine cover (if applicable) using a socket wrench.
Disconnect the ignition coils by unplugging the connectors.
Unscrew the spark plugs using a spark plug socket.
Inspect and replace worn spark plugs with OEM equivalents.
Reinstall ignition coils and engine cover.

4. Check and Adjust Tire Pressure

Use a tire pressure gauge to measure each tire’s pressure.
Inflate tires to the recommended PSI listed on the driver’s door jamb.
Inspect tires for uneven wear and replace if necessary.

5. Fuel System Cleaning

Add a fuel system cleaning additive to the fuel tank as per manufacturer instructions.
Optionally, use a fuel pressure gauge to check if the fuel pump is operating within specifications.