my Ford Explorer Fifth Generation (2011-2019) has a loss of acceleration, what could be the problem?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

598 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 Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic procedures 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 servicing components to avoid burns.

Symptoms

•Check engine light illuminated
•Engine stalling during acceleration
•Rough or uneven idle
•Poor fuel economy
•Unresponsive throttle
•Increased engine noise under load

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the throttle body for carbon buildup or damage.
3
Check the air filter for clogs or restrictions that may limit airflow.
4
Test fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
5
Inspect the spark plugs for wear or fouling that may affect engine performance.
6
Examine the Mass Air Flow (MAF) sensor for dirt or malfunction.

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
•Fuel pressure gauge
•Multimeter
•Throttle body cleaner

Parts Required

•Spark plugs (if replacement is necessary)
•Fuel pump (if determined to be faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the throttle body for carbon buildup or damage.
3
Check the air filter for clogs or restrictions that may limit airflow.
4
Test fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
5
Inspect the spark plugs for wear or fouling that may affect engine performance.
6
Examine the Mass Air Flow (MAF) sensor for dirt or malfunction.

Solution

1. Preparation

Gather tools and safety equipment: OBD-II scanner, socket set, fuel pressure gauge, multimeter, cleaning supplies, and safety glasses.
Ensure the vehicle is parked on a level surface and the engine is off before beginning work.

2. Throttle Body Cleaning

Disconnect the battery before working on the electrical components.
Remove the throttle body duct by loosening the clamps with a socket wrench.
Detach the throttle body from the intake manifold by removing the mounting bolts with a socket wrench.
Clean the throttle body using throttle body cleaner and a soft cloth. Pay special attention to the butterfly valve and surrounding areas.
Reinstall the throttle body and reconnect the duct.

3. Fuel Pressure Test

Locate the fuel pressure test port on the fuel rail.
Connect the fuel pressure gauge to the test port.
Turn the ignition to the "on" position without starting the engine and check the pressure reading; it should match the manufacturer's specifications.
If pressure is low, replace the fuel pump or check for fuel line restrictions.

4. Spark Plug Inspection

Remove the ignition coil or spark plug wires from the spark plugs.
Use a socket wrench to remove the spark plugs from the engine.
Inspect each spark plug for wear, corrosion, or fouling. Replace if necessary.
Reinstall the spark plugs and reconnect the ignition coils or wires.

5. MAF Sensor Cleaning

Locate the MAF sensor in the intake air duct.
Disconnect the electrical connector and remove the MAF sensor from the duct.
Spray MAF sensor cleaner onto the sensor element to remove dirt and debris. Avoid touching the sensor directly.
Reinstall the MAF sensor and reconnect the electrical connector.