🔧 1500 - Ignition Coil Replacement

Your 1500’s 5.7L uses one ignition coil per cylinder (8 total). Replacing a coil is straightforward: unplug the electrical connector, remove the coil bolt, swap the coil, and reinstall.

Difficulty Level: Beginner | Estimated Time: 0.8-2.0 hours

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⚠️ Safety & Precautions

• ⚠️ Let the engine cool fully before working near the exhaust manifolds.
• ⚠️ Disconnect the negative battery cable to prevent accidental shorting and misfire codes while unplugging coils.
• ⚠️ Pull on connectors by the plastic housing, not the wires.
• ⚠️ Keep dirt out of the spark plug wells; blow debris out before removing coils.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 1/4" ratchet
• 6" extension (1/4" drive)
• Torque wrench (in-lb or low-range Nm)
• Flat trim tool
• Pick tool
• 7mm socket
• Phillips screwdriver
• Shop air blow gun
• Clean shop towels
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Ignition coil - Qty: 1 (or Qty: 8 if replacing all)
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and let the engine cool.
• Disconnect the battery negative terminal using a 10mm socket and isolate the cable so it can’t spring back.
• Replace coils one at a time to avoid mix-ups.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover (if equipped)

• Pull up on the cover to release it from the grommets (use a flat trim tool if it’s tight).
• Set it aside on a clean towel.

Step 2: Make space (only if needed for access)

• Loosen the intake hose clamp using a 7mm socket or Phillips screwdriver (whichever your clamp uses).
• Move the intake tube slightly out of the way to reach the passenger-side coils, if necessary.

Step 3: Identify the coil you’re replacing

• Each coil is bolted to the valve cover and sits directly over a spark plug.
• Wipe the area with clean shop towels so dirt won’t fall into the plug well.

Step 4: Unplug the coil electrical connector

• Use a pick tool to gently lift the connector lock (a small safety tab that prevents accidental unplugging).
• Press the release tab and pull the connector straight off by hand.
• Don’t pry hard—tabs break easily.

Step 5: Remove the coil retaining bolt

• Remove the coil bolt using a 10mm socket, 1/4" ratchet, and 6" extension.
• Keep the bolt where it won’t get lost.

Step 6: Remove the coil from the spark plug

• Twist the coil boot slightly, then pull upward to remove the coil.
• If dirt is visible around the plug well, blow it out using a shop air blow gun before installing the new coil.
• (A “boot” is the rubber sleeve on the bottom of the coil that seals to the spark plug.)

Step 7: Prep and install the new coil

• Apply a very small amount of dielectric grease inside the new coil boot (just a thin film).
• Push the new coil straight down until you feel it seat onto the spark plug.

Step 8: Reinstall the coil bolt and torque it

• Start the bolt by hand to avoid cross-threading.
• Tighten with a 10mm socket.
• Torque to 9 Nm (80 in-lb) using a torque wrench (in-lb or low-range Nm).

Step 9: Reconnect the coil electrical connector

• Push the connector on until it clicks.
• Re-engage the lock tab fully (use a pick tool only if needed).

Step 10: Repeat for remaining coils (if replacing more than one)

• Work one coil at a time and double-check each connector is fully seated.

Step 11: Reassemble and reconnect battery

• Reinstall the intake tube and tighten the clamp using a 7mm socket or Phillips screwdriver.
• Reinstall the engine cover by pressing it onto the grommets.
• Reconnect the battery negative terminal using a 10mm socket.

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✅ After Repair

• Start the engine and let it idle for 30–60 seconds. It should run smooth with no flashing check-engine light.
• If the check-engine light stays on, drive normally for a couple trips; if it doesn’t clear, scan for codes (a parts-store scan works).
• Recheck that every coil connector is clicked in and locked if you still feel a misfire.

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💰 DIY vs Shop Cost

Shop Cost: $180-$450 (parts + labor) for 1-2 coils; $700-$1,300 for all 8

DIY Cost: $35-$90 per coil (parts only); $280-$720 for all 8

You Save: $100-$600+ by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-2.0 hours.

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🎯 Ready to get started?

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