🔧 Ignition Coils - Replacement

The ignition coils on your Ram sit on top of the spark plugs and provide the high voltage needed to fire each cylinder. If you have a misfire, rough idle, or flashing check engine light, replacing a bad coil can fix it fast.

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

---

⚠️ Safety & Precautions

• Work on a cool engine only. Ignition coils sit on top of the engine and can be hot after driving.
• Turn the key off and remove it before starting.
• Disconnect the negative battery cable if you want extra safety while unplugging coils.
• Keep dirt out of the spark plug wells. Debris can fall into the engine and cause damage.
• Do not pull on the wire harness. Always release the connector lock first.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• 1/4-inch ratchet
• 1/4-inch extension
• Trim clip tool
• Flat-blade screwdriver
• Torque wrench
• Gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 per failed cylinder
• Spark plugs - Qty: 6 if replacing all
• Dielectric grease - Qty: 1

---

📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool fully.
• If you are replacing one coil, note which cylinder set a misfire code.
• Tip: Replace worn spark plugs at the same time.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect power

• Use a 10mm wrench to disconnect the negative battery cable.
• Set the cable aside so it cannot touch the battery terminal.

Step 2: Remove engine cover

• If equipped, lift off the plastic engine cover by hand.
• If it feels stuck, use a trim clip tool to gently release any retainers.

Step 3: Access the coil

• Locate the ignition coil on top of the cylinder you are servicing.
• Use an 8mm socket with a 1/4-inch ratchet and extension to remove the coil hold-down bolt.

Step 4: Unplug the coil

• Use a flat-blade screwdriver to gently lift the connector lock if needed.
• Press the release tab and pull the connector straight off the coil.
• Tip: Wiggle lightly, don’t force it.

Step 5: Remove the old coil

• Pull the coil straight up out of the spark plug well by hand.
• If it sticks, twist slightly while pulling upward.

Step 6: Inspect the spark plug well

• Look for oil, water, or debris in the plug tube.
• If dirt is present, clean it out before installing the new coil.

Step 7: Install the new coil

• Apply a small amount of dielectric grease inside the coil boot.
• Push the new coil straight down onto the spark plug until fully seated.
• Install the coil hold-down bolt with the 8mm socket.
• Torque to 9 Nm (80 in-lbs).

Step 8: Reconnect the connector

• Push the electrical connector onto the coil until it clicks.
• Make sure the lock tab is fully seated.

Step 9: Reassemble and repeat

• Reinstall the engine cover if equipped.
• Repeat the same steps for any other coils being replaced.

---

✅ After Repair

• Reconnect the negative battery cable with a 10mm wrench.
• Start the engine and let it idle.
• Check for rough running, warning lights, or misfire symptoms.
• If the check engine light was on, clear codes with a scan tool and recheck after a short drive.
• If you replaced one coil, consider replacing the spark plugs soon if they are worn.

---

💰 DIY vs Shop Cost

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

DIY Cost: $40-$180 (parts only)

You Save: $140-$270 by doing it yourself!

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