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

563 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

Learn 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.
•Allow the engine to cool before opening the throttle body or fuel system components.

Symptoms

•Check engine light illuminated
•Engine stalling during acceleration
•Unresponsive throttle
•Reduced engine power
•Increased engine RPMs without corresponding speed increase
•Unusual engine noises during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any engine-related issues.
2
Inspect the air filter for clogging or dirt that may restrict airflow to the engine.
3
Check fuel pressure with a fuel pressure gauge to ensure proper fuel delivery.
4
Examine the throttle body for carbon buildup or mechanical binding.
5
Inspect the transmission fluid level and condition for proper operation.
6
Test the mass airflow sensor (MAF) for accurate readings 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
•Fuel pressure gauge
•Socket set
•Throttle body cleaner
•MAF cleaner
•Torque wrench

Parts Required

•Air filter
•Fuel filter (if applicable)
•Throttle body gasket (if removed)
•Transmission fluid (if replacing)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any engine-related issues.
2
Inspect the air filter for clogging or dirt that may restrict airflow to the engine.
3
Check fuel pressure with a fuel pressure gauge to ensure proper fuel delivery.
4
Examine the throttle body for carbon buildup or mechanical binding.
5
Inspect the transmission fluid level and condition for proper operation.
6
Test the mass airflow sensor (MAF) for accurate readings using a multimeter.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Address Airflow Issues

Inspect and Replace Air Filter:
1. Locate the air filter housing and open it.
2. Remove the old air filter and inspect for dirt and debris.
3. Install a new air filter if necessary.
Clean Throttle Body:
1. Remove the throttle body from the intake manifold (if necessary).
2. Use throttle body cleaner and a soft cloth to clean the throttle plate and intake side.
3. Reinstall the throttle body and ensure all connections are secure.

3. Check Fuel System

Test and Replace Fuel Filter (if applicable):
1. Locate the fuel filter in the fuel line.
2. Depressurize the fuel system by removing the fuel pump relay and starting the engine until it stalls.
3. Disconnect the fuel lines and replace the filter, ensuring proper orientation.
Inspect Fuel Injectors:
1. Check for injector clogs by removing and cleaning them with an ultrasonic cleaner.
2. Reinstall the injectors and reconnect the fuel lines.

4. Inspect and Replace Sensors

Mass Airflow Sensor Inspection:
1. Locate the MAF sensor in the air intake duct.
2. Disconnect the electrical connector and remove the sensor.
3. Clean the sensor with MAF cleaner and reinstall.

5. Transmission Fluid Check

Inspect and Replace Transmission Fluid:
1. Check the transmission fluid level using the dipstick.
2. If low or burnt, drain the old fluid and replace it with manufacturer-recommended transmission fluid.
3. Recheck the level after replacing.