This procedure covers the removal and replacement of all eight ignition coils on the 2015-2020 Ford F-150 5.0L Coyote V8 engine, including spark plug replacement.

Warnings

Tools required

Parts

• Ignition coil × 8 — Motorcraft DG-508 or equivalent
• Spark plug × 8 — Motorcraft SP-534 or equivalent

Preparation

1. Ensure engine is completely cool to the touch
2. Disconnect negative battery terminal and wait 2 minutes before proceeding
3. Remove engine cover by pulling upward on front edge to release clips
4. If equipped, remove plastic wire harness covers by releasing clips

Procedure

1. 1

   Access passenger side ignition coils
   The passenger side (right) bank has easier access. Identify cylinders 1, 2, 3, and 4 on the passenger side from front to rear. Clear any debris from around the coil boots to prevent contamination from falling into cylinders.
2. 2

   Disconnect ignition coil electrical connectors
   Press the release tab on each coil connector and pull straight up to disconnect. Do not pull on wires. Start with passenger side cylinders 1-4. Work methodically from front to rear to maintain organization.
3. 3

   Remove passenger side ignition coils
   Remove the single 10mm bolt securing each coil. Carefully twist and pull the coil straight up to remove from the spark plug well. If coils are stuck, gently twist while pulling - do not pry or force. Remove all four passenger side coils.
   Torque spec

   Ignition Coil Bolts8 Nm (6 lb-ft)
4. 4

   Remove passenger side spark plugs
   Use compressed air or vacuum to clean debris from around each spark plug before removal. Use a 5/8" spark plug socket with extension to remove each plug. Turn counterclockwise and remove carefully. Inspect plugs for abnormal wear, oil fouling, or carbon buildup which may indicate engine issues.
   Torque spec

   Spark Plugs - Aluminum Head20 Nm (15 lb-ft)
5. 5

   Install passenger side spark plugs
   Check spark plug gap specification (typically 0.050-0.054 inches for this engine). Apply a thin coat of anti-seize compound to spark plug threads only - do not get anti-seize on the electrode. Hand-thread each plug carefully to avoid cross-threading. Torque to specification using a torque wrench.
   ⚠Cross-threading spark plugs in aluminum heads can cause expensive damage - always start by hand
   Torque spec

   Spark Plugs - Aluminum Head20 Nm (15 lb-ft)
6. 6

   Install passenger side ignition coils
   Apply a small amount of dielectric grease inside the coil boot where it contacts the spark plug terminal. Insert each coil into the spark plug well and press down firmly until fully seated. The coil should sit flush with the valve cover. Install and hand-tighten the 10mm retaining bolt, then torque to specification.
   Torque spec

   Ignition Coil Bolts8 Nm (6 lb-ft)
7. 7

   Access driver side ignition coils
   Identify cylinders 5, 6, 7, and 8 on the driver side (left bank) from front to rear. The driver side may have additional wire harness routing that needs to be moved aside. Clear any debris from around the coil boots.
8. 8

   Remove driver side ignition coils and spark plugs
   Repeat the disconnection and removal process for the driver side. Press connector release tabs and disconnect all four coil connectors. Remove 10mm coil retaining bolts. Twist and pull coils straight up. Clean spark plug wells with compressed air, then remove spark plugs using the 5/8" socket.
   Torque spec

   Ignition Coil Bolts8 Nm (6 lb-ft)

   Spark Plugs - Aluminum Head20 Nm (15 lb-ft)
9. 9

   Install driver side spark plugs and coils
   Check gap on new spark plugs. Apply anti-seize to threads and hand-start each plug. Torque plugs to specification. Apply dielectric grease to coil boots. Install coils, ensuring they are fully seated, then install and torque retaining bolts to specification.
   Torque spec

   Spark Plugs - Aluminum Head20 Nm (15 lb-ft)

   Ignition Coil Bolts8 Nm (6 lb-ft)
10. 10

    Reconnect all electrical connectors
    Reconnect all eight ignition coil electrical connectors. Push each connector down firmly until you hear or feel a distinct click indicating the locking tab has engaged. Verify each connection is secure by gently tugging upward on the connector body (not the wires).
11. 11

    Reinstall engine covers and reconnect battery
    Reinstall any wire harness covers that were removed. Align and press the engine cover back onto its mounting clips until fully seated. Reconnect the negative battery terminal and tighten securely.

Reassembly

1. Ensure all eight ignition coil connectors are fully engaged and locked
2. Verify all coil retaining bolts are torqued to specification
3. Confirm engine cover and any removed harness covers are properly reinstalled
4. Double-check that no tools or parts were left in the engine bay

Verification

• Turn ignition to ON position (do not start) and verify no check engine light or coil-related warning messages appear
• Start engine and listen for smooth, even idle with no misfires or rough running
• Rev engine gently to 2000-2500 RPM and verify smooth operation across all cylinders
• Allow engine to reach operating temperature and verify no misfires occur under load
• Use a scan tool to check for any pending misfire codes (P0300-P0308) if available

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