🔧 Ignition Coils - Replacement

Your F-150’s ignition coils sit on top of the spark plugs and fire each cylinder. If one has failed, you may see misfires, rough idle, loss of power, or a check engine light. The job is straightforward on this engine, but keep the engine cold and work carefully around the coil connectors.

Difficulty Level: Beginner | Estimated Time: 1.5-2.5 hours

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⚠️ Safety & Precautions

• Let the engine cool completely before starting. The turbocharged engine and intake parts can stay hot for a long time.
• Do not pull on the wiring. Release each connector lock before unplugging the coil.
• Keep dirt out of the spark plug tubes. Debris can cause misfires after reassembly.
• Disconnect the negative battery cable if you want extra safety while working on the ignition system.
• If any coil boot is stuck to the spark plug, remove it gently so it does not tear.

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🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• 10mm socket
• Ratchet
• 3-inch extension
• Trim panel tool
• Pick tool
• Torque wrench
• Compressed air nozzle
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 per coil serviced
• Dielectric grease - Qty: 1
• Spark plug - Qty: 6 if replacing all plugs at the same time

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Turn the ignition off and remove the key or fob from the vehicle.
• Let the engine cool fully.
• If disconnecting the battery, remove the negative cable first with a 10mm socket.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover

• Use a trim panel tool or pull up gently by hand to remove the engine appearance cover.
• Set it aside where it will not crack or get dirty.

Step 2: Access the ignition coils

• Locate the coil pack on top of each spark plug.
• If intake tubing blocks access on your side of the engine, loosen the clamps with an 8mm socket and move the tube aside.
• Keep bolts and clips in a tray.

Step 3: Disconnect the coil connector

• Use a pick tool to release the connector lock if needed.
• Press the connector tab and unplug the coil.
• Inspect the connector for oil, corrosion, or broken plastic.

Step 4: Remove the coil retaining bolt

• Use a 10mm socket and ratchet to remove the coil hold-down bolt.
• Lift the coil straight up and out of the spark plug well.
• Torque spec on installation: 7 Nm (62 in-lb)

Step 5: Inspect and clean the plug well

• Use compressed air nozzle to blow out dirt from around the spark plug tube.
• Check the old coil boot for tears, oil, or carbon tracking.
• If oil is present, the valve cover seal may need attention.

Step 6: Install the new ignition coil

• Apply a small amount of dielectric grease inside the new coil boot.
• Push the coil straight down onto the spark plug until fully seated.
• Install the retaining bolt by hand first, then tighten with a 10mm socket.
• Torque to 7 Nm (62 in-lb)

Step 7: Reconnect the electrical connector

• Push the connector onto the coil until it clicks.
• Make sure the lock tab is fully engaged.
• Repeat Steps 3 through 7 for any remaining coils.

Step 8: Reinstall removed intake parts and engine cover

• Reinstall any intake tube or ducting you moved earlier using the 8mm socket.
• Press the engine cover back into place by hand.

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✅ After Repair

• Start the engine and let it idle.
• Listen for a smooth idle and check that the check engine light is off.
• If the light remains on, clear codes with a scan tool and recheck for misfires.
• If you replaced one coil due to a misfire, consider checking the spark plugs too.

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💰 DIY vs Shop Cost

Shop Cost: $220-$520 (parts + labor)

DIY Cost: $45-$180 (parts only)

You Save: $175-$340 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 hours.

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🎯 Ready to get started?

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