why does my Ford Explorer have poor acceleration after 60 mph

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

579 words

Problem Statement

Learn how to diagnose and fix poor acceleration issues in Ford Explorer. 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 inspecting the fuel system or exhaust components.

Symptoms

•Engine misfire at higher RPMs
•Loss of power during acceleration
•Increased engine noise or vibration
•Check engine light illuminated
•Poor throttle response
•Decreased fuel efficiency

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the air intake system for clogs or leaks that could restrict airflow.
3
Check fuel pressure with a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Inspect the spark plugs and ignition system for wear or damage.
5
Test the throttle position sensor (TPS) for proper voltage output.
6
Examine the exhaust system for blockages or leaks that could affect performance.

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
•Spark plug socket
•Torque wrench

Parts Required

•Spark plugs
•Fuel filter
•Throttle position sensor (if faulty)

Related Faults

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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 air intake system for clogs or leaks that could restrict airflow.
3
Check fuel pressure with a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Inspect the spark plugs and ignition system for wear or damage.
5
Test the throttle position sensor (TPS) for proper voltage output.
6
Examine the exhaust system for blockages or leaks that could affect performance.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent electrical issues.

2. Inspect and Replace Spark Plugs

Remove the ignition coils using a socket set.
Extract the spark plugs using a spark plug socket.
Inspect the spark plugs for wear; replace if damaged or excessively worn.
Install new spark plugs, torquing to manufacturer specifications (typically around 13-15 ft-lbs).
Reinstall the ignition coils.

3. Fuel System Maintenance

Disconnect the fuel pump relay and start the engine to relieve fuel pressure.
Remove the fuel filter and replace it with a new one.
Check the fuel lines for any signs of wear or leaks and replace if necessary.
Reconnect the fuel pump relay and turn the ignition to the "on" position (without starting) to prime the fuel system.

4. Throttle Position Sensor Adjustment

Locate the throttle position sensor on the throttle body.
Disconnect the electrical connector and remove the mounting screws.
Install the new throttle position sensor, ensuring it is aligned correctly.
Reconnect the electrical connector and clear any stored error codes.

5. Exhaust System Inspection

Visually inspect the exhaust pipes and catalytic converter for signs of blockage or damage.
If a blockage is found, replace the affected components.
Ensure all exhaust clamps and mounts are secure.

6. Final Checks

Reconnect the battery.
Start the engine and allow it to reach operating temperature.
Test drive the vehicle to ensure improved acceleration performance.