how to resolve a rough running engine in Ford Explorer Sixth Generation (2020-present)

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

613 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 a rough running engine in Ford Explorer Sixth Generation (2020-present). 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 the throttle body or removing components.

Symptoms

•Rough idle when the engine is at a standstill
•Hesitation during acceleration
•Decreased power output
•Engine stalling intermittently
•Illuminated check engine light
•Poor fuel economy

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the air intake system for any obstructions or leaks that could affect airflow.
3
Check the spark plugs and ignition coils for wear or damage.
4
Examine fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.
5
Inspect the throttle body for carbon buildup or malfunctions.
6
Verify the condition of the mass airflow sensor (MAF) and clean or replace as necessary.

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
•Spark plug socket
•Ratchet and extensions
•Torque wrench
•Throttle body cleaner
•MAF sensor cleaner
•Fuel pressure gauge

Parts Required

•Spark plugs
•Ignition coils (if necessary)
•MAF sensor (if cleaning does not resolve issues)

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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 intake system for any obstructions or leaks that could affect airflow.
3
Check the spark plugs and ignition coils for wear or damage.
4
Examine fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.
5
Inspect the throttle body for carbon buildup or malfunctions.
6
Verify the condition of the mass airflow sensor (MAF) and clean or replace as necessary.

Solution

1. Preparation

Gather tools and parts required.
Disconnect the negative battery terminal to ensure safety while working on electrical components.
Allow the engine to cool before starting any work.

2. Inspect and Replace Spark Plugs

Sub-steps:
1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connectors and remove the ignition coils from the spark plugs.
3. Extract the old spark plugs using a spark plug socket and ratchet.
4. Inspect the old spark plugs for signs of wear or fouling and compare them to the manufacturer's specifications.
5. Install new spark plugs, ensuring the correct gap is set as per manufacturer specifications (typically 0.028-0.032 inches).
6. Reinstall the ignition coils and reconnect the connectors.

3. Clean the Throttle Body

Sub-steps:
1. Remove the intake air duct to access the throttle body.
2. Spray throttle body cleaner onto a clean cloth and wipe the throttle body’s interior surfaces.
3. Ensure the throttle plate moves freely and is not sticking.
4. Reattach the intake air duct securely.

4. Check and Clean the MAF Sensor

Sub-steps:
1. Disconnect the MAF sensor connector.
2. Remove the MAF sensor from the air intake tube.
3. Spray MAF sensor cleaner onto the sensor element (do not touch the element).
4. Allow the sensor to dry completely before reinstalling it.

5. Verify Fuel Pressure

Sub-steps:
1. Connect the fuel pressure gauge to the fuel rail test port.
2. Turn the ignition to the "ON" position without starting the engine and check the pressure reading. It should be within the manufacturer's specified range (consult service manual).
3. If pressure is low, inspect the fuel pump and fuel filter for issues.