🔧 Ignition Coils - Replacement

The ignition coils on your F-150 fire the spark plugs. If one fails, you can get a rough idle, misfires, poor fuel economy, or a check engine light. This job is straightforward because the coils sit on top of the engine and can be replaced one at a time.

Difficulty Level: Beginner | Estimated Time: 1-2 hours

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⚠️ Safety & Precautions

• Let the engine cool completely before starting. The coil area can be very hot.
• Disconnect the negative battery cable before touching the ignition system.
• Do not pull on ignition coil wires or harness connectors by force.
• Keep dirt and debris out of the spark plug wells.
• If a coil boot is stuck to a spark plug, remove it carefully so it does not tear.

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🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• Ratchet
• Extension
• Trim tool
• Needle-nose pliers
• Torque wrench
• Safety glasses
• Gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 6

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Shut the engine off and let it cool.
• Disconnect the negative battery cable.
• Replace coils in a set only if multiple are weak or failed.
• Tip: Label the coils if you remove them one by one.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect battery power

• Use an 8mm socket to remove the negative battery cable.
• Move the cable aside so it cannot touch the battery terminal.

Step 2: Remove the engine cover

• Pull up gently on the engine cover to remove it.
• If it feels stuck, use a trim tool to help lift evenly.

Step 3: Access the ignition coils

• Locate the coil packs on top of the engine.
• Each coil sits directly over a spark plug.
• Tip: Work on one coil at a time.

Step 4: Unplug the coil connector

• Press the locking tab on the connector.
• Use your fingers or needle-nose pliers if needed to release the plug gently.
• Do not pull on the wires.

Step 5: Remove the coil retaining bolt

• Use an 8mm socket and ratchet to remove the coil hold-down bolt.
• Keep the bolt in a safe place.
• Torque on installation: 8 Nm (71 in-lbs)

Step 6: Remove the ignition coil

• Twist the coil slightly to break it free.
• Pull the coil straight up out of the spark plug well.
• If the boot stays on the spark plug, remove it carefully with needle-nose pliers.

Step 7: Install the new ignition coil

• Compare the new coil to the old one before installing.
• Push the new coil straight down onto the spark plug.
• Install the retaining bolt by hand first.
• Use a torque wrench and 8mm socket to tighten to 8 Nm (71 in-lbs).

Step 8: Reconnect the electrical connector

• Push the connector in until it clicks.
• Lightly tug it to make sure it is locked.

Step 9: Repeat for all needed coils

• Repeat the same steps for each coil you are replacing.
• If you are replacing only one coil, inspect the others for cracks or oil contamination.

Step 10: Reinstall the engine cover and battery cable

• Press the engine cover back into place.
• Reconnect the negative battery cable with an 8mm socket.
• Tighten it snugly.

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✅ After Repair

• Start the engine and listen for smooth idle.
• Check that the check engine light is off.
• If the light stays on, scan for misfire codes.
• Take a short test drive and make sure the engine accelerates smoothly.

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💰 DIY vs Shop Cost

Shop Cost: $350-$700 (parts + labor)

DIY Cost: $180-$420 (parts only)

You Save: $170-$280 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 hours.

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🎯 Ready to get started?

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