🔧 Pacifica - Ignition Coil Replacement

Ignition coils sit on top of each spark plug and create the high voltage needed to fire the plug. On your Pacifica, the front 3 coils are easy to access, but the rear 3 coils require removing the upper intake manifold (the plastic “plenum” on top of the engine).

Difficulty Level: Intermediate | Estimated Time: 1.0-3.0 hours

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⚠️ Safety & Precautions

• ⚠️ Let the engine cool fully to avoid burns.
• ⚠️ Hybrid safety: keep clear of orange high-voltage cables; do not unplug any orange connectors.
• ⚠️ Disconnect the 12V negative battery cable before unplugging coils or sensors.
• ⚠️ Keep the key fob at least 15 feet away so the vehicle can’t “wake up.”

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Ratchet (3/8")
• Socket set: 8mm, 10mm
• Torx bit set
• Extension set (3", 6")
• Swivel adapter (3/8")
• Torque wrench (in-lb or low-range ft-lb)
• Trim clip removal tool
• Pick tool
• Needle-nose pliers
• Shop light
• Magnetic parts tray

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 (or Qty: 6 to replace all)
• Upper intake manifold gasket set - Qty: 1 (required if replacing rear-bank coils)
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and apply the parking brake.
• Open the hood and remove the key fob from the work area.
• Disconnect the 12V battery negative cable using a 10mm socket and wait 2 minutes.
• Take a quick photo before unplugging anything.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover

• Pull up firmly on the engine cover to release the rubber grommets (no tools).
• Set it aside where it won’t get stepped on.

Step 2: Decide which bank you’re replacing

• Front bank (radiator side): coils are visible—skip to Step 5.
• Rear bank (firewall side): coils are under the upper intake manifold—continue to Step 3.

Step 3: Remove the air intake ducting (rear-bank access)

• Loosen the hose clamp(s) using an 8mm socket or appropriate Torx bit (varies by clamp style).
• Disconnect any small breather hose(s) using needle-nose pliers.
• Lift the duct out and set it aside.

Step 4: Remove the upper intake manifold (rear-bank access)

• Unplug the sensors on the intake using a pick tool to lift the lock tab (a lock tab is the small safety catch that prevents the connector from backing out).
• Remove the intake fasteners using a 10mm socket, ratchet (3/8"), and extensions.
• Lift the upper intake manifold straight up and off. Use a shop light to confirm nothing is still connected.
• Cover the open intake ports with a clean lint-free cloth so nothing can fall in.
• On reassembly, tighten intake fasteners evenly: Torque to 12 Nm (105 in-lbs).

Step 5: Unplug the ignition coil connector

• Press the connector release and pull the connector off the coil by hand.
• If it’s stubborn, use a pick tool gently—don’t pry hard on the wires.

Step 6: Remove the ignition coil

• Remove the coil hold-down bolt using a 10mm socket and ratchet (3/8").
• Twist the coil slightly, then pull straight up to remove it from the spark plug.

Step 7: Install the new ignition coil

• Apply a very small amount of dielectric grease inside the rubber coil boot (dielectric grease helps prevent moisture and makes future removal easier).
• Push the coil straight down until you feel it seat on the spark plug.
• Install the hold-down bolt using a 10mm socket.
• Tighten the bolt: Torque to 9 Nm (80 in-lbs).
• Reconnect the electrical connector until it clicks.

Step 8: Reinstall removed components

• If you removed the intake, install new intake gaskets, then reinstall the upper intake manifold using a 10mm socket and torque wrench: Torque to 12 Nm (105 in-lbs).
• Reinstall the air intake duct and tighten clamps using an 8mm socket or Torx bit.
• Reinstall the engine cover by pressing it back onto the grommets.

Step 9: Reconnect the 12V battery

• Reconnect the negative battery cable using a 10mm socket.

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✅ After Repair

• Start the engine and let it idle for 1–2 minutes. It should run smooth with no shaking.
• If the check engine light was on for a misfire, clear codes with a scan tool (optional) and confirm it doesn’t return.
• Do a short test drive and recheck that all intake clamps/connectors are secure.
• If it still misfires, swap coil positions to confirm.

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💰 DIY vs Shop Cost

Shop Cost: $250-$700 (parts + labor, depends on front vs rear bank)

DIY Cost: $40-$360 (parts only, 1 coil vs all 6 + gaskets)

You Save: $200-$400 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-3 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.