why does my Ford F-150 13th Generation (2015-2020) lose acceleration once warm

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

567 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix loss of acceleration in Ford F-150 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 the engine to cool before opening the air intake system.

Symptoms

•Check engine light illuminated
•Engine stalling during acceleration
•Rough idle after warming up
•Poor fuel economy
•Hesitation or lag when pressing the accelerator
•Increased emissions detected

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect fuel pressure using a fuel pressure gauge to ensure adequate fuel delivery.
3
Check the condition of the air filter to rule out airflow restrictions.
4
Test the ignition system components, including spark plugs and ignition coils, for proper function.
5
Examine the throttle body for carbon buildup or malfunction.
6
Inspect the crankshaft and camshaft position sensors for proper operation.

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
•Throttle body cleaner
•Spark plug socket

Parts Required

•Spark plugs
•Ignition coils (if necessary)
•Air filter
•Fuel filter (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect fuel pressure using a fuel pressure gauge to ensure adequate fuel delivery.
3
Check the condition of the air filter to rule out airflow restrictions.
4
Test the ignition system components, including spark plugs and ignition coils, for proper function.
5
Examine the throttle body for carbon buildup or malfunction.
6
Inspect the crankshaft and camshaft position sensors for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the parking brake engaged.
Disconnect the battery to ensure safety during repairs.

2. Inspect and Clean Throttle Body

Remove the air intake duct connected to the throttle body.
Use throttle body cleaner and a soft cloth to clean the interior of the throttle body.
Ensure the throttle plate moves freely without obstruction.
Reassemble the air intake duct and reconnect any disconnected sensors.

3. Replace Spark Plugs and Ignition Coils (if necessary)

Remove the ignition coil cover (if applicable) and disconnect the ignition coil connectors.
Unbolt and remove the ignition coils from the spark plugs.
Carefully remove the old spark plugs using a spark plug socket.
Install new spark plugs, ensuring they are gapped correctly as per manufacturer specifications.
Reinstall the ignition coils and reconnect their electrical connectors.

4. Test Fuel Pressure

Connect a fuel pressure gauge to the fuel rail Schrader valve.
Start the engine and monitor the fuel pressure; it should meet manufacturer specifications.
If pressure is too low, diagnose and replace the fuel pump or filter as needed.

5. Check and Replace Air Filter

Locate the air filter housing and remove the cover.
Inspect the air filter; if it’s dirty or clogged, replace it with a new one.
Reassemble the air filter housing securely.