why does my Ford Explorer Fifth Generation (2011-2019) accelerate slowly

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

570 words

Problem Statement

Learn how to diagnose and fix slow acceleration issues 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 opening any components.

Symptoms

•Engine hesitation during acceleration
•Loss of power when merging or climbing hills
•Unusual engine noises (e.g., knocking or sputtering)
•Check engine light illuminated
•Poor fuel economy
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the engine or transmission.
2
Inspect the air filter for clogs or restrictions that may affect airflow to the engine.
3
Check fuel pressure using a fuel pressure gauge to ensure adequate fuel delivery.
4
Inspect the throttle body for carbon buildup or malfunction.
5
Examine spark plugs and ignition coils for wear or failure affecting engine performance.
6
Verify the condition of the transmission fluid and check for any leaks or contamination.

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
•Throttle body cleaner
•Spark plug socket

Parts Required

•Air filter
•Fuel pump (if needed)
•Spark plugs
•Ignition coils (if needed)
•Transmission fluid

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the engine or transmission.
2
Inspect the air filter for clogs or restrictions that may affect airflow to the engine.
3
Check fuel pressure using a fuel pressure gauge to ensure adequate fuel delivery.
4
Inspect the throttle body for carbon buildup or malfunction.
5
Examine spark plugs and ignition coils for wear or failure affecting engine performance.
6
Verify the condition of the transmission fluid and check for any leaks or contamination.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Air Filter Replacement

Remove the air filter housing cover using a socket set.
Take out the old air filter and inspect the housing for debris.
Install a new air filter (OEM recommended) ensuring a proper seal.

3. Fuel Pressure Check and Adjustment

Connect the fuel pressure gauge to the fuel rail.
Start the engine and observe the pressure reading; it should match the specifications (typically around 30-50 psi).
If pressure is low, check and replace the fuel pump if necessary.

4. Throttle Body Cleaning

Remove the air intake duct from the throttle body using a socket set.
Use throttle body cleaner and a soft cloth to clean the inside of the throttle body.
Reinstall the air intake duct and ensure all clamps are secure.

5. Spark Plug and Ignition Coil Replacement

Remove the engine cover if necessary to access the spark plugs.
Disconnect the ignition coil connectors and remove the coils using a socket set.
Remove the spark plugs using a spark plug socket and inspect for wear.
Install new spark plugs (gap according to manufacturer specifications) and reattach the coils.

6. Transmission Fluid Check

Locate the transmission dipstick and check fluid level; add OEM transmission fluid if low.
If fluid is discolored or burnt, consider a fluid change and filter replacement.