🔧 Transit Connect - Ignition Coil Replacement

Ignition coils create the high-voltage spark your engine needs to run smoothly. When a coil gets weak or fails, it can cause misfires, rough idle, flashing check-engine light, and poor power.

Difficulty Level: Beginner | Estimated Time: 0.5-1.5 hours

Assumption: Your 2.5L uses coil-on-plug coils on top of the valve cover.

---

⚠️ Safety & Precautions

• ⚠️ Let the engine cool fully before starting.
• ⚠️ Keep the key out of the vehicle to prevent accidental starting.
• ⚠️ Disconnect the negative battery cable to avoid accidental shorts.
• ⚠️ Never pull on the wiring; only pull on connectors.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• 10mm socket
• 8mm socket
• 7mm socket
• 1/4" drive ratchet
• 1/4" drive extension (3"-6")
• Torque wrench (inch-pound or low-range Nm)
• Flat trim tool
• Needle-nose pliers
• OBD2 scan tool
• Flashlight

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 (or Qty: 4 to replace all)
• Dielectric grease - Qty: 1
• Ignition coil boot - Qty: 1 (only if damaged)

---

📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Place wheel chocks behind the rear wheels.
• Open the hood and let the engine cool.
• Disconnect the battery: use a 10mm socket to remove the negative (-) cable and move it aside.
• Dielectric grease is silicone grease that prevents moisture and helps boots slide on.
• A torque wrench helps tighten bolts without over-tightening.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover (if equipped)

• Use a flashlight to locate the plastic engine cover on top of the engine.
• If it’s bolted on, remove fasteners using a 8mm socket (some covers use 7mm socket).
• If it’s press-fit, carefully pry up with a flat trim tool and lift it off.

Step 2: Locate the ignition coils

• Use a flashlight to find the coils lined up on top of the valve cover (one coil per cylinder).
• Each coil will have an electrical connector and usually one small hold-down bolt.

Step 3: Unplug the coil electrical connector

• Press the connector lock tab by hand; if it’s stubborn, gently assist with a flat trim tool.
• Pull the connector straight off the coil (do not yank on the wires).
• If dirty, blow away debris before unplugging.

Step 4: Remove the coil hold-down bolt

• Remove the coil bolt using an 8mm socket with a 1/4" drive ratchet and extension (3"-6").
• Place the bolt somewhere safe so it can’t fall into the engine bay.

Step 5: Remove the ignition coil

• Twist the coil gently left-right to break the seal, then pull straight up by hand.
• If the rubber boot stayed stuck on the spark plug, remove it carefully using needle-nose pliers.
• Inspect the coil boot for oil, tears, or carbon tracking (black lightning-like lines).

Step 6: Install the new ignition coil

• Apply a small dab of dielectric grease inside the end of the boot (a pea-sized amount).
• Push the new coil straight down onto the spark plug until it seats firmly.
• Reinstall the hold-down bolt using an 8mm socket.
• Tighten the coil bolt with a torque wrench: Torque to 7 Nm (62 in-lbs).

Step 7: Reconnect the coil connector

• Push the connector on by hand until you feel/hear it click.
• Lightly tug the connector to confirm it’s locked.

Step 8: Reinstall the engine cover

• Reinstall the cover and any fasteners using a 8mm socket (or 7mm socket if that’s what yours uses).
• Snug the fasteners with a 1/4" drive ratchet (do not over-tighten plastic).

Step 9: Reconnect the battery

• Reinstall the negative battery cable using a 10mm socket.
• Make sure the terminal is snug and doesn’t rotate by hand.

---

✅ 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, use an OBD2 scan tool to clear codes and confirm misfire counts stay at zero.
• Test drive for 10-15 minutes and recheck for warning lights.
• If you find oil in a spark plug well, the valve cover gasket may be leaking and should be addressed.

---

💰 DIY vs Shop Cost

Shop Cost: $200-$500 (parts + labor, depending on replacing 1 coil vs all)

DIY Cost: $40-$280 (parts only, depending on replacing 1 coil vs all)

You Save: $160-$220 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.

---

🎯 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.