🔧 Kona - Ignition Coil Replacement

Your Kona’s ignition coils sit on top of the engine and send high voltage to the spark plugs. Replacing a weak coil can fix misfires, rough idle, and flashing check-engine light.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

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⚠️ Safety & Precautions

• Work on a fully cool engine to avoid burns.
• Keep water and oil out of the spark plug wells (the deep holes under the coils).
• If you disconnect the battery, use a 10mm wrench and remove the negative terminal first.
• Do not pull on wiring—always release the connector lock tab first.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" drive ratchet
• 3" extension for 1/4" drive ratchet
• 10mm combination wrench
• Small flathead screwdriver
• Torque wrench (inch-pound or low-range Nm)
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground and turn the ignition fully off.
• Open the hood and let the engine cool completely.
• Optional but recommended: disconnect the battery negative terminal using a 10mm wrench.
• Replace coils one-by-one to avoid mixing connectors.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover (if equipped)

• Grip the cover firmly and pull upward to release the push-in grommets.
• Set the cover aside where it won’t get stepped on.

Step 2: Locate the ignition coils

• Find the row of coils on top of the engine, each with an electrical connector and a single hold-down bolt.
• Identify the coil you’re replacing (for example, cylinder 1 is typically on the belt/chain end of the engine).

Step 3: Unplug the coil connector

• Use a small flathead screwdriver to gently lift the lock tab if it’s stubborn (don’t break it).
• Pull the connector straight off the coil.

Step 4: Remove the coil hold-down bolt

• Use a 10mm socket, 3" extension, and 1/4" drive ratchet to remove the bolt.
• Place the bolt somewhere safe so it can’t fall into the engine bay.

Step 5: Remove the ignition coil

• Twist the coil slightly left-right to unstick the boot, then pull straight up.
• If the coil feels glued in place, keep twisting gently—don’t pry hard on plastic parts.

Step 6: Prep and install the new coil

• Apply a tiny smear of dielectric grease inside the rubber boot (this helps sealing and future removal).
• Push the new coil straight down until you feel it fully seat on the spark plug.
• Install the hold-down bolt by hand first to avoid cross-threading.
• Tighten with a torque wrench (a torque wrench is a tool that tightens bolts to an exact setting): Torque to 9.8 Nm (7 ft-lbs).

Step 7: Reconnect the coil connector

• Push the connector on until it clicks/locks.
• Gently tug to confirm it’s secure.

Step 8: Reinstall the engine cover

• Line up the cover grommets and press down firmly until it snaps into place.

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✅ After Repair

• If you disconnected the battery, reconnect it using a 10mm wrench (negative terminal last removed, first reinstalled).
• Start the engine and let it idle for 1-2 minutes. It should run smooth.
• Road test for 10 minutes and confirm no hesitation or flashing check-engine light.
• If the check-engine light was on, clear codes with a scan tool and confirm the misfire code does not return.

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💰 DIY vs Shop Cost

Shop Cost: $180-$450 (parts + labor)

DIY Cost: $50-$320 (parts only, depends if replacing 1 or all)

You Save: $100-$250 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.