why is my Ford Explorer Fifth Generation (2011-2019) losing power on the highway?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

586 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 engine power loss in Ford Explorer (2011-2019). 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 working on any engine components.

Symptoms

•Check engine light illuminated
•Engine stalling during acceleration
•Rough idling when stopped
•Decreased fuel efficiency
•Unusual engine noises (e.g., knocking or pinging)
•Vehicle struggles to accelerate beyond a certain speed

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored codes related to engine performance.
2
Inspect the air filter for clogs or damage, which can restrict airflow to the engine.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering adequate pressure.
4
Examine the throttle body for carbon buildup or malfunction.
5
Inspect ignition components (spark plugs, ignition coils) for wear or damage.
6
Test the mass airflow sensor (MAF) using a multimeter to ensure it is functioning correctly.

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
•Multimeter

Parts Required

•Air filter
•Fuel pump (if required)
•Spark plugs (if required)
•Ignition coils (if required)
•MAF sensor (if required)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored codes related to engine performance.
2
Inspect the air filter for clogs or damage, which can restrict airflow to the engine.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering adequate pressure.
4
Examine the throttle body for carbon buildup or malfunction.
5
Inspect ignition components (spark plugs, ignition coils) for wear or damage.
6
Test the mass airflow sensor (MAF) using a multimeter to ensure it is functioning correctly.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the battery to prevent electrical shocks or shorts.

2. Inspect and Replace the Air Filter

Remove the air filter housing cover using a socket set.
Take out the old air filter and inspect for dirt and debris.
Replace with a new air filter that meets OEM specifications.

3. Fuel System Check

Reconnect the battery and turn the ignition to the "ON" position (do not start the engine).
Connect the fuel pressure gauge to the fuel rail.
Start the engine and check the pressure reading; it should match the specifications (typically around 60-66 psi).
If the pressure is low, replace the fuel pump and filter following the manufacturer’s guidelines.

4. Throttle Body Cleaning

Disconnect the throttle body connector and remove the intake duct.
Use throttle body cleaner and a clean cloth to gently scrub the throttle body, removing carbon buildup.
Reassemble the components and reconnect the battery.

5. Ignition System Inspection and Replacement

Remove the ignition coils using a socket set.
Inspect spark plugs for signs of wear, gap, or fouling; replace if necessary.
Reinstall the ignition coils and ensure they are properly seated.

6. MAF Sensor Testing

Disconnect the MAF sensor connector.
Use a multimeter to check the sensor output according to the vehicle specifications.
If it is out of range, replace the MAF sensor.