why does my Ford Explorer Fifth Generation (2011-2019) have poor acceleration

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

566 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

Discover how to diagnose and fix poor acceleration issues in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms and solutions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Relieve fuel system pressure before disconnecting fuel lines.

Symptoms

•Check engine light illuminated
•Sluggish response when pressing the accelerator
•Engine stalling during acceleration
•Decreased fuel efficiency
•Unusual engine noises (e.g., sputtering or rough running)
•Black smoke from the exhaust

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs).
2
Inspect the air filter for clogs or excessive dirt and replace if necessary.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Examine the throttle body for carbon buildup or obstructions and clean if needed.
5
Inspect the spark plugs and ignition coils for wear or damage, replacing as necessary.
6
Test the mass airflow sensor (MAF) for proper operation using a multimeter.

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
•Throttle body cleaner
•Soft cloth
•Fuel pressure gauge
•Spark plug socket
•Ignition coil removal tool
•Multimeter

Parts Required

•Air filter (if dirty)
•Fuel filter
•Spark plugs
•MAF sensor (if faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs).
2
Inspect the air filter for clogs or excessive dirt and replace if necessary.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Examine the throttle body for carbon buildup or obstructions and clean if needed.
5
Inspect the spark plugs and ignition coils for wear or damage, replacing as necessary.
6
Test the mass airflow sensor (MAF) for proper operation using a multimeter.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the negative battery terminal.
Ensure the vehicle is on a level surface and securely supported.

2. Clean the Throttle Body

Remove the air intake duct connected to the throttle body.
Use throttle body cleaner and a soft cloth to clean the inside of the throttle body.
Ensure the throttle plate moves freely and is not sticking.
Reattach the air intake duct securely.

3. Inspect/Replace Fuel Filter

Locate the fuel filter, usually along the fuel line under the vehicle.
Relieve the fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
Disconnect the fuel lines from the filter using the appropriate line removal tool.
Replace the old fuel filter with a new one, ensuring correct orientation.
Reconnect the fuel lines and replace the fuse.

4. Replace Spark Plugs

Remove the ignition coil cover if applicable.
Disconnect the ignition coils from the spark plugs.
Use a spark plug socket to remove the old spark plugs.
Install new spark plugs, ensuring to gap them according to manufacturer specifications.
Reconnect the ignition coils and cover.

5. Test and Replace MAF Sensor (if necessary)

Disconnect the MAF sensor connector.
Measure voltage output while the engine is running to check for proper function.
If out of specification, replace the MAF sensor with a new one.
Reconnect the MAF sensor and ensure all connections are secure.