how to fix a faulty ignition coil on my Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

440 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 faulty ignition coil in a 2011-2019 Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool down before starting repairs.

Symptoms

•Check engine light illuminated
•Engine misfires or runs rough
•Decreased fuel efficiency
•Difficulty starting the engine
•Engine stalling or hesitation during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any misfire or ignition-related codes.
2
Inspect the ignition coil visually for signs of damage, such as cracks or corrosion.
3
Check the electrical connector for loose or corroded connections.
4
Measure the resistance of the ignition coil using a multimeter to verify if it is within the manufacturer's specifications.
5
Test the coil's output voltage with a spark tester to ensure proper functioning.

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
•Multimeter
•Torque wrench
•Spark tester

Parts Required

•New ignition coil(s)
•Spark plug(s) (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any misfire or ignition-related codes.
2
Inspect the ignition coil visually for signs of damage, such as cracks or corrosion.
3
Check the electrical connector for loose or corroded connections.
4
Measure the resistance of the ignition coil using a multimeter to verify if it is within the manufacturer's specifications.
5
Test the coil's output voltage with a spark tester to ensure proper functioning.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Remove Ignition Coil

Locate the ignition coil(s) by removing the engine cover if necessary.
Disconnect the electrical connector from the ignition coil.
Remove the bolts securing the ignition coil using a socket set.
Gently pull the ignition coil out of the spark plug well.

3. Inspect and Replace

Inspect the spark plug for wear or damage; replace if necessary.
Compare the old ignition coil with the new one to ensure compatibility.
Install the new ignition coil into the spark plug well, ensuring it seats properly.

4. Reconnect and Test

Reattach the bolts securing the ignition coil and tighten to the manufacturer’s torque specifications.
Reconnect the electrical connector firmly.
Reconnect the battery.

5. Final Checks

Start the engine and check for any warning lights.
Perform a test drive to verify the engine runs smoothly without misfires.