why does my Ford Explorer Fifth Generation (2011-2019) have a hesitation when accelerating

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

592 words

Problem Statement

Learn how to diagnose and fix hesitation during acceleration in the 2011-2019 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 battery before working on electrical systems.
•Allow engine to cool before working on engine components.

Symptoms

•Hesitation or lag when pressing the accelerator
•Engine stalling at low speeds or during acceleration
•Rough idle when the engine is at a standstill
•Check engine light illuminated
•Poor fuel economy
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the air filter for blockages or excessive dirt that could restrict airflow.
3
Check fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
4
Inspect spark plugs for wear or fouling and check ignition coil function.
5
Evaluate the throttle body for carbon buildup or mechanical issues.
6
Examine the Mass Air Flow (MAF) sensor for contamination or failure.

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
•Multimeter
•Throttle body cleaner
•MAF sensor cleaner

Parts Required

•Air filter
•Fuel filter (if applicable)
•Spark plugs
•Ignition coils (if applicable)
•Throttle body gasket (if needed)

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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 filter for blockages or excessive dirt that could restrict airflow.
3
Check fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
4
Inspect spark plugs for wear or fouling and check ignition coil function.
5
Evaluate the throttle body for carbon buildup or mechanical issues.
6
Examine the Mass Air Flow (MAF) sensor for contamination or failure.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and engine is cool.
Disconnect the battery to prevent electrical shorts.

2. Clean or Replace the Air Filter

Locate the air filter housing and remove the cover using a socket set.
Remove the air filter and inspect it for dirt and blockages.
If dirty, replace it with a new air filter; if clean, reinstall it securely.

3. Fuel System Inspection

Attach a fuel pressure gauge to the fuel rail’s test port.
Turn the ignition key to the "ON" position (without starting) to check the fuel pressure.
If the pressure is below specifications, inspect the fuel pump and fuel filter for issues.
Replace the fuel filter if necessary, following manufacturer specifications.

4. Spark Plug and Ignition Coil Inspection

Remove the spark plug wires carefully to avoid damage.
Use a spark plug socket to remove each spark plug and inspect for wear or carbon buildup.
Replace worn spark plugs with new ones and reinstall.
Test ignition coils for proper function using a multimeter and replace faulty coils as necessary.

5. Throttle Body Cleaning

Remove the throttle body from the intake manifold after disconnecting any electrical connectors and hoses.
Use throttle body cleaner and a clean rag to remove carbon buildup from the throttle plate and housing.
Reinstall the throttle body, ensuring all connections are secure.

6. MAF Sensor Service

Locate the MAF sensor in the air intake duct.
Disconnect the electrical connector and remove the sensor.
Clean the sensor using MAF cleaner and allow it to dry.
Reinstall the MAF sensor and reconnect the electrical connector.