How to Replace Ignition Coils 12-17 Jeep Wrangler

Introduction

This tutorial will guide you through the process of replacing ignition coils on a 2012-2017 Jeep Wrangler. Ignition coils are crucial for your vehicle's engine performance, and replacing them can resolve issues such as misfiring or difficulty starting. This step-by-step guide will ensure you can successfully perform this repair yourself.

Step 1: Gather Your Tools

Before starting the replacement process, ensure you have the necessary tools. Here’s a list of what you will need:

• Flat Blade Screwdriver
• 10mm Socket
• 8mm Socket
• Trim Tool Set
• Hose Clamp Pliers
• Needle Nose Pliers
• Ratchet
• Socket Extensions
• Swivel
• Torque Wrench
• Paper Towels
• Pick

Step 2: Prepare the Vehicle

1. Park the Jeep: Ensure the vehicle is on a flat surface and the engine is off.
2. Disconnect the Battery: Remove the negative terminal from the battery to prevent any electrical issues during the replacement.

Step 3: Access the Ignition Coils

1. Remove Engine Cover:

   • Use the 10mm socket to remove the bolts securing the engine cover.
   • Gently lift off the cover and set it aside.

2. Locate Ignition Coils: Identify the ignition coils, which are typically mounted on top of the engine.

Step 4: Remove the Old Ignition Coils

1. Disconnect Electrical Connectors:

   • Carefully detach the electrical connectors from each ignition coil. Use a flat blade screwdriver if needed to gently pry them off.

2. Unbolt the Coils:

   • Use the 8mm socket to remove the bolts securing each ignition coil.
   • Lift the coils straight out of their positions. If they are stuck, gently twist them to free them.

Step 5: Install New Ignition Coils

1. Prepare New Coils:

   • Compare the new ignition coils with the old ones to ensure they are the correct fit.

2. Insert New Coils:

   • Place the new ignition coils into their respective slots.
   • Secure them using the 8mm bolts. Ensure they are tightened properly.

3. Reconnect Electrical Connectors:

   • Firmly attach the electrical connectors to each new ignition coil.

Step 6: Reassemble the Engine

1. Replace Engine Cover:

   • Position the engine cover back onto the engine.
   • Use the 10mm socket to reattach the bolts.

2. Reconnect the Battery:

   • Reattach the negative terminal to the battery.

Step 7: Test the Vehicle

1. Start the Engine:

   • Turn on the ignition to test if the vehicle starts smoothly.
   • Listen for any unusual sounds or misfires.

2. Check Engine Light:

   • Ensure that the check engine light is not illuminated.

Conclusion

Replacing the ignition coils on your Jeep Wrangler can improve engine performance and reliability. Always remember to work safely and take appropriate precautions when handling vehicle components. If you experience further issues even after replacing the coils, consider consulting a professional mechanic for a thorough diagnosis. Happy driving!