ignition

Coil Pack

for 2018 Ford F-150 5.0L V8 Coyote · RWD

Difficulty

Easy

Time

1.0 h

Tools

Steps

This procedure covers the removal and replacement of ignition coil packs on the 2015-2020 Ford F-150 equipped with the 5.0L Coyote V8 engine.

Warnings

⚠Allow engine to cool completely before working on ignition system to prevent burns

⚠Do not pull on ignition coil wires; always grasp the boot when disconnecting

ℹ️The 5.0L Coyote has individual coil-on-plug design with 8 total coils, 4 per cylinder bank

Tools required

3/8 inch drive ratchetEssential

3/8 inch drive extension setEssential

7mm socketEssential

5/8 inch spark plug socket

Torque wrench (5-25 lb-ft range)Essential

Dielectric greaseEssential

Anti-seize compound

Compressed air or vacuum

Parts

Ignition coil pack (specify quantity needed) × 1 — Motorcraft DG-508 or equivalent

Preparation

Ensure engine is completely cool to the touch
Open hood and secure with prop rod
Disconnect negative battery terminal and wait 2 minutes for system capacitors to discharge
Identify which coil(s) need replacement (cylinders numbered 1-4 passenger side front to rear, 5-8 driver side front to rear)

Procedure

1
Access the ignition coil
Locate the target ignition coil on top of the engine. The coils sit directly on top of each spark plug in the valve cover. For rear coils (cylinders 3, 4, 7, 8), you may need to move aside hoses or wiring harnesses for better access.
2
Disconnect electrical connector
Press down on the connector locking tab and pull the electrical connector straight off the coil. Do not twist or rock the connector excessively. Inspect the connector terminals for corrosion or damage.
3
Remove ignition coil mounting bolt
Using a 7mm socket with extension, remove the single bolt securing the ignition coil to the valve cover. Keep the bolt in a safe location for reinstallation.
Torque spec
Ignition Coil Bolts8 Nm (6 lb-ft)
4
Extract the ignition coil
Grasp the ignition coil body firmly and pull straight up with a twisting motion to break the seal between the coil boot and spark plug. The coil may be tight due to the rubber boot seal. Avoid excessive rocking that could damage the spark plug ceramic insulator.
5
Clean spark plug well
Use compressed air or a vacuum to remove any debris, dirt, or oil from the spark plug well before installing the new coil. Foreign material in the well can cause misfires or coil damage. Inspect the spark plug well for oil accumulation which could indicate a valve cover gasket leak.
6
Inspect spark plug condition
With the coil removed, visually inspect the spark plug for fouling, damage, or excessive electrode wear. If replacing the coil due to misfire, consider replacing the spark plug as well. Check spark plug gap if not replacing (0.051-0.057 inch specification for this engine).
7
Prepare new ignition coil
Apply a thin coating of dielectric grease to the inside of the new coil boot where it contacts the spark plug. This prevents moisture intrusion and makes future removal easier. Do not use excessive grease as it can interfere with electrical connection.
8
Install new ignition coil
Align the new coil with the spark plug and valve cover mounting hole. Push down firmly with a slight twisting motion until the coil boot fully seats on the spark plug. The coil should sit flush against the valve cover surface.
9
Install coil mounting bolt
Insert the 7mm mounting bolt and hand-thread it several turns to ensure proper alignment. Using a torque wrench, tighten to specification. Do not overtighten as this can crack the coil housing.
Torque spec
Ignition Coil Bolts8 Nm (6 lb-ft)
10
Reconnect electrical connector
Push the electrical connector onto the coil until you hear and feel a positive click. Gently tug on the connector to verify it is fully locked. Apply a small amount of dielectric grease to the connector seal if desired for moisture protection.
11
Reconnect battery
Reconnect the negative battery terminal. The PCM may need to relearn idle characteristics after battery disconnect.

Reassembly

Ensure all wiring harnesses and hoses moved during access are returned to their original positions
Verify all electrical connectors are fully seated and locked

Verification

Start the engine and verify it runs smoothly without misfires or rough idle
Check for any diagnostic trouble codes using a scan tool; clear codes if the failed coil was the only issue
Listen for unusual clicking or arcing sounds from the ignition coils during idle
Perform a test drive and verify normal acceleration and power delivery under load