why is my Ford Explorer Fifth Generation (2011-2019) accelerating slowly

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 slow 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 battery before working on electrical systems.
•Allow engine to cool before opening components.

Symptoms

•Check engine light illuminated
•Engine stalling during acceleration
•Loss of power when accelerating
•Poor fuel economy
•Unusual noises from the engine
•High RPM without corresponding vehicle speed increase

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 physical obstructions.
3
Check the air filter for clogs or damage that could restrict airflow.
4
Test fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering adequate pressure.
5
Examine spark plugs for wear or fouling that could affect combustion.
6
Inspect the transmission fluid level and condition; low or burnt fluid can hinder acceleration.

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
•Throttle body cleaner
•Fuel pressure gauge
•Torque wrench

Parts Required

•Air filter
•Fuel pump (if needed)
•Spark plugs

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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 physical obstructions.
3
Check the air filter for clogs or damage that could restrict airflow.
4
Test fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering adequate pressure.
5
Examine spark plugs for wear or fouling that could affect combustion.
6
Inspect the transmission fluid level and condition; low or burnt fluid can hinder acceleration.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety during repairs.
Allow the engine to cool before beginning work.

2. Clean or Replace Throttle Body

Remove the intake duct connected to the throttle body using a socket set.
Use throttle body cleaner and a soft brush to clean the throttle body surfaces.
Reassemble the intake duct securely.

3. Replace Air Filter

Locate the air filter housing (usually near the engine).
Unclip or unscrew the housing cover and remove the old air filter.
Install a new air filter, ensuring it fits snugly in place.
Reassemble the housing cover.

4. Test and Replace Fuel Pump (if needed)

Connect a fuel pressure gauge to the fuel rail.
Turn the ignition to the "ON" position (without starting the engine) to check fuel pressure.
If the pressure is below specifications (consult repair manual), replace the fuel pump.
To replace the fuel pump, remove the rear seat (if necessary), access the fuel pump module, and follow the manufacturer's instructions for replacement.

5. Replace Spark Plugs

Remove the ignition coils on top of the spark plugs using a socket set.
Use a spark plug socket to remove old spark plugs.
Install new spark plugs, torqueing them to the manufacturer’s specifications (typically around 13-15 lb-ft).
Reinstall the ignition coils.

6. Check Transmission Fluid

If low, add the appropriate transmission fluid type as specified in the owner’s manual.
If the fluid is burnt, consider a transmission fluid change.