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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

571 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 in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before opening the radiator or working on the fuel system.

Symptoms

•Check engine light illuminated
•Sluggish throttle response
•Stuttering during acceleration
•Decreased fuel efficiency
•Unusual engine noises (e.g., knocking or whining)
•Transmission slipping or delayed shifting

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any fault codes.
2
Inspect the air intake system for blockages or leaks that could affect airflow.
3
Check the fuel pressure using a fuel pressure gauge to ensure the fuel pump is providing adequate pressure.
4
Examine the throttle body for carbon buildup or malfunctions.
5
Inspect the transmission fluid level and condition, looking for signs of contamination or low levels.
6
Conduct a visual inspection of spark plugs and ignition coils for wear or damage.

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
•Torque wrench
•Throttle body cleaner
•Multimeter

Parts Required

•Fuel filter
•Spark plugs
•Ignition coils (if faulty)
•Transmission fluid

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any fault codes.
2
Inspect the air intake system for blockages or leaks that could affect airflow.
3
Check the fuel pressure using a fuel pressure gauge to ensure the fuel pump is providing adequate pressure.
4
Examine the throttle body for carbon buildup or malfunctions.
5
Inspect the transmission fluid level and condition, looking for signs of contamination or low levels.
6
Conduct a visual inspection of spark plugs and ignition coils for wear or damage.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is turned off.
Gather tools and parts required for the repair.

2. Addressing Airflow Issues

Remove the air intake duct: Disconnect clamps and hoses, and remove the air intake duct from the throttle body.
Clean the throttle body: Use throttle body cleaner and a soft cloth to remove carbon buildup from the throttle body.
Reassemble: Reinstall the air intake duct, ensuring all connections are secure.

3. Fuel System Repair

Test fuel pressure: Connect a fuel pressure gauge to the fuel rail and turn the ignition key to the "on" position without starting the engine.
Replace fuel filter: If pressure is low, replace the fuel filter located along the fuel line.
Inspect fuel pump: If the issue persists, drop the fuel tank to access the fuel pump and replace if necessary.

4. Ignition System Check

Inspect spark plugs: Remove spark plugs using a socket wrench; check for wear, fouling, or damage.
Replace spark plugs: If worn, replace with OEM or equivalent spark plugs, ensuring proper torque (generally 13-15 ft-lbs).
Check ignition coils: Test ignition coils with a multimeter; replace any faulty coils.

5. Transmission Maintenance

Check transmission fluid: Inspect fluid level and condition through the dipstick; add fluid if low.
Flush the transmission: If fluid is dirty or burnt, consider performing a transmission fluid flush and replace with OEM fluid.
Inspect transmission filter: If applicable, replace the transmission filter.