how to identify a bad ignition coil in 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

462 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 identify and replace a bad ignition coil in your Ford Explorer (2011-2019). 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 completely before working on ignition components.

Symptoms

•Check engine light illuminated
•Rough idle or engine hesitation
•Engine misfires or sputtering during acceleration
•Decreased fuel efficiency
•Difficulty starting the engine
•Increased emissions

Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes related to the ignition system.
2
Inspect the ignition coil visually for any signs of damage such as cracks or corrosion.
3
Check the ignition coil's electrical connections for looseness or damage.
4
Measure the resistance of the ignition coil using a multimeter and compare it to the manufacturer's specifications.
5
Swap the suspected bad ignition coil with a known good one to see if the misfire follows the coil.
6
Perform a spark test to confirm the coil is delivering spark to the spark plug.

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
•Multimeter
•Socket set
•Torque wrench

Parts Required

•Ignition coil(s)
•Spark plugs (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes related to the ignition system.
2
Inspect the ignition coil visually for any signs of damage such as cracks or corrosion.
3
Check the ignition coil's electrical connections for looseness or damage.
4
Measure the resistance of the ignition coil using a multimeter and compare it to the manufacturer's specifications.
5
Swap the suspected bad ignition coil with a known good one to see if the misfire follows the coil.
6
Perform a spark test to confirm the coil is delivering spark to the spark plug.

Solution

1. Preparation

Gather necessary tools and components.
Disconnect the vehicle's battery to prevent electrical shock.
Ensure the engine is cool before proceeding.

2. Remove the Ignition Coil

Locate the ignition coil on the engine.
Remove the electrical connector from the ignition coil by pressing the tab and pulling it off.
Unscrew the mounting bolts holding the ignition coil in place using a socket set.
Carefully pull the ignition coil out of the spark plug hole.

3. Inspect and Replace

Inspect the removed ignition coil for any visible damage or signs of wear.
If replacing, install the new ignition coil into the spark plug hole.
Secure it with the mounting bolts, tightening them to the manufacturer's specified torque (typically around 7-10 ft-lbs).
Reattach the electrical connector ensuring a solid connection.

4. Reconnect Battery and Test

Reconnect the vehicle's battery.
Start the engine and observe for any warning lights.
Perform a test drive to ensure smooth operation.