🔧 Edge - Ignition Coil Replacement

Replacing the ignition coils on your Edge is a straightforward repair. The coils sit on top of the engine and send high voltage to the spark plugs, so a weak coil can cause misfires, rough idle, poor acceleration, or a check engine light.

Difficulty Level: Beginner | Estimated Time: 30-60 minutes

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⚠️ Safety & Precautions

• ⚠️ Work only on a cool engine to avoid burns.
• ⚠️ Disconnect the negative battery terminal before unplugging ignition coils.
• ⚠️ Do not pull on the wiring itself; pull only on the connector body.
• ⚠️ Ignition coils create high voltage when running, so never touch them with the engine on.

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🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• 10mm socket
• 3/8-inch ratchet
• 3-inch extension
• Torque wrench inch-pound range
• Small flathead screwdriver
• Compressed air blow gun
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1-4
• Dielectric grease - Qty: 1 small tube

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📋 Before You Begin

• Park your Edge on level ground and set the parking brake.
• Let the engine cool fully before starting.
• Open the hood and make sure the ignition is OFF.
• If you are replacing only one coil, mark the bad coil location before removal.
• A torque wrench is a tool that tightens bolts to an exact tightness so plastic and aluminum parts are not damaged.
• Dielectric grease is a non-conductive grease used inside the rubber boot to help seal out moisture.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the Battery

• Use a 10mm socket and 3/8-inch ratchet to loosen the negative battery terminal clamp.
• Move the negative cable away from the battery post so it cannot spring back and touch.
• Negative terminal usually has a minus symbol.

Step 2: Remove the Engine Appearance Cover

• Grip the plastic engine cover with both hands and pull upward evenly.
• If your cover uses fasteners, use an 8mm socket and 3/8-inch ratchet to remove them.
• Set the cover aside where it will not be stepped on.

Step 3: Locate the Ignition Coils

• Look across the top of the engine for four ignition coils.
• Each coil has an electrical connector and one small retaining bolt.
• If replacing one coil, match it to the cylinder that triggered the misfire code.
• Replace one coil at a time to avoid mix-ups.

Step 4: Clean Around the Coil Area

• Put on safety glasses.
• Use a compressed air blow gun to blow dirt away from the top of each coil.
• This helps keep debris from falling into the spark plug well after the coil is removed.

Step 5: Unplug the Ignition Coil Connector

• Press the connector release tab by hand and pull the connector straight back.
• If the tab is stuck, use a small flathead screwdriver gently to lift the lock tab.
• Do not pry hard. The connector plastic can become brittle with age.

Step 6: Remove the Ignition Coil Bolt

• Use an 8mm socket, 3-inch extension, and 3/8-inch ratchet to remove the coil retaining bolt.
• Set the bolt in a safe place so it does not fall into the engine bay.

Step 7: Remove the Old Ignition Coil

• Twist the ignition coil gently left and right by hand.
• Pull the coil straight upward out of the spark plug well.
• If it feels stuck, keep twisting gently while pulling upward.
• Do not use force against the wiring.

Step 8: Prepare the New Ignition Coil

• Compare the new coil to the old coil before installing it.
• Apply a very small amount of dielectric grease inside the rubber boot opening.
• Do not fill the boot with grease. A light film is enough.

Step 9: Install the New Ignition Coil

• Push the new coil straight down into the spark plug well by hand.
• You should feel the boot seat onto the spark plug.
• Reinstall the coil bolt by hand first to avoid cross-threading.
• Use an 8mm socket, 3-inch extension, and torque wrench inch-pound range to tighten the bolt.
• Torque to 6 Nm (53 in-lbs)

Step 10: Reconnect the Coil Connector

• Push the electrical connector onto the ignition coil until it clicks.
• Lightly tug the connector by hand to confirm it is locked.

Step 11: Repeat for Additional Coils

• If replacing more than one coil, repeat Steps 5 through 10 for each coil.
• Use the same 8mm socket, 3-inch extension, and torque wrench inch-pound range for each retaining bolt.
• Torque each coil bolt to 6 Nm (53 in-lbs)

Step 12: Reinstall the Engine Cover

• Place the engine cover back in position.
• Press it down firmly by hand until it seats on its rubber mounts.
• If fasteners were removed, use an 8mm socket and 3/8-inch ratchet to reinstall them snugly.

Step 13: Reconnect the Battery

• Place the negative battery cable back on the battery post.
• Use a 10mm socket and 3/8-inch ratchet to tighten the clamp.
• Do not overtighten the clamp.

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✅ After Repair

• ✅ Start your Edge and let it idle for 1-2 minutes.
• ✅ Listen for smooth idle and confirm there is no shaking or misfire.
• ✅ If the check engine light was on, clear the code with a scan tool or drive several trips after the repair to allow the system to retest.
• ✅ Test drive gently first, then accelerate normally to confirm the hesitation or misfire is gone.
• ✅ If the same cylinder misfire returns, inspect the spark plug, coil connector, and wiring next.

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💰 DIY vs Shop Cost

Shop Cost: $180-$550 (parts + labor)

DIY Cost: $45-$320 (parts only)

You Save: $135-$230 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.