why does my Ford F-150 13th Generation (2015-2020) use so much fuel?

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

559 words

Problem Statement

Discover how to diagnose and fix fuel economy issues in the 2015-2020 Ford F-150. Step-by-step guide with symptoms, diagnostic steps, 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 opening the hood or inspecting the fuel system.

Symptoms

•Check engine light illuminated
•Rough idle
•Decreased acceleration
•Engine stalling intermittently
•Unusually loud engine noise
•Poor fuel economy (lower miles per gallon than expected)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any underlying issues.
2
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning correctly.
3
Inspect air filter for blockages or clogging that could restrict airflow.
4
Examine spark plugs for wear or deposits that might hinder combustion efficiency.
5
Inspect the exhaust system for leaks or restrictions that could affect engine performance.
6
Check tire pressure and tread condition, as under-inflated or worn tires can increase fuel consumption.

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
•Fuel pressure gauge
•Socket set
•Torque wrench
•Tire pressure gauge

Parts Required

•Fuel filter
•Spark plugs
•Air filter

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any underlying issues.
2
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning correctly.
3
Inspect air filter for blockages or clogging that could restrict airflow.
4
Examine spark plugs for wear or deposits that might hinder combustion efficiency.
5
Inspect the exhaust system for leaks or restrictions that could affect engine performance.
6
Check tire pressure and tread condition, as under-inflated or worn tires can increase fuel consumption.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to ensure safety during the repair.

2. Fuel System Inspection

Remove the fuel pump fuse and run the engine until it stalls to relieve fuel pressure.
Disconnect the fuel lines from the fuel rail using a line wrench.
Replace the fuel filter if it is clogged or has not been changed according to the maintenance schedule.

3. Spark Plug Replacement

Remove the ignition coil cover if applicable.
Unscrew and remove the spark plugs using a spark plug socket.
Inspect the old spark plugs for wear or carbon buildup; replace with new spark plugs that meet OEM specifications.
Torque the new spark plugs to the manufacturer's specification (typically around 13-15 lb-ft).

4. Air Filter Replacement

Locate the air filter housing and release the clips or screws to open it.
Remove the old air filter and inspect the housing for debris.
Install a new air filter ensuring it fits snugly and seals properly.

5. Exhaust Inspection

Inspect the exhaust system visually for any signs of leaks, cracks, or damage.
Replace any damaged exhaust components such as gaskets or pipes as needed.

6. Tire Check

Measure tire pressure using a tire pressure gauge and inflate to the manufacturer’s recommended psi.
Inspect tires for tread wear and uneven wear patterns; rotate or replace tires as necessary.