how to troubleshoot the Ford Explorer Sixth Generation (2020-present) engine misfires

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

658 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 troubleshoot engine misfires in the Ford Explorer (2020-present). Step-by-step guide with symptoms, diagnostic steps, 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

Symptoms

•Check engine light illuminated
•Rough idle
•Loss of power during acceleration
•Increased fuel consumption
•Engine stalling or hesitation
•Unusual engine sounds (e.g., popping or backfiring)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific misfire codes.
2
Inspect the spark plugs for wear or fouling; replace if necessary.
3
Check ignition coils for proper operation and signs of damage.
4
Verify fuel pressure with a fuel pressure gauge to ensure proper delivery.
5
Examine the air intake system for blockages or leaks that could affect air-fuel mixture.
6
Perform a compression test to check for internal engine issues.

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
•Torque wrench
•Fuel pressure gauge
•Spark plug socket
•Compression tester

Parts Required

•Spark plugs
•Ignition coils (if necessary)
•Fuel filter (if necessary)
•Air filter

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific misfire codes.
2
Inspect the spark plugs for wear or fouling; replace if necessary.
3
Check ignition coils for proper operation and signs of damage.
4
Verify fuel pressure with a fuel pressure gauge to ensure proper delivery.
5
Examine the air intake system for blockages or leaks that could affect air-fuel mixture.
6
Perform a compression test to check for internal engine issues.

Solution

1. Preparation

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

2. Inspect and Replace Spark Plugs

Remove the engine cover if applicable.
Use a socket set to carefully remove the spark plug wires or ignition coils.
Use a spark plug socket to remove the spark plugs from the engine.
Inspect the spark plugs for signs of wear, carbon deposits, or damage. Replace with OEM parts if necessary.
Torque the new spark plugs to the manufacturer’s specifications (typically between 13-15 lb-ft).

3. Check and Replace Ignition Coils

Visually inspect ignition coils for cracks or damage.
Remove the bolts securing the ignition coils using a socket set.
Disconnect the electrical connectors from each ignition coil.
Replace any faulty ignition coils with new OEM parts, ensuring proper alignment and seating.
Reconnect the electrical connectors and secure the bolts.

4. Fuel System Inspection

Connect a fuel pressure gauge to the fuel rail.
Turn the ignition to the "ON" position (engine off) and check the fuel pressure reading against manufacturer specifications (typically 50-60 psi).
If fuel pressure is low, inspect the fuel filter and fuel pump for proper function. Replace components as necessary.

5. Air Intake System Check

Inspect the air filter for blockages and replace if dirty.
Examine intake hoses for cracks or leaks; replace as needed.
Ensure the Mass Air Flow (MAF) sensor is clean and functioning properly. Clean with MAF sensor cleaner if necessary.

6. Compression Test

Remove the spark plugs and connect a compression tester to each cylinder.
Crank the engine and record the compression readings.
Compare results to manufacturer specifications (typically 120-180 psi).
If readings are below specifications, further investigation into internal engine components (e.g., valves, piston rings) may be required.