Tune-Up - Minor

This procedure covers a minor tune-up for the 2011-2014 Ford F-150 with 5.0L Coyote V8 engine, including spark plug replacement, air filter replacement, and basic engine inspection.

Warnings

Tools required

Parts

• Spark plugs × 8 — Motorcraft SP-520 or equivalent platinum (8 required)
• Engine air filter × 1 — Motorcraft FA-1927

Preparation

1. Ensure engine is completely cool to the touch
2. Park vehicle on level surface and engage parking brake
3. Open hood and secure with prop rod
4. Gather all tools and parts before beginning work
5. Verify new spark plugs are correct application and properly gapped

Procedure

1. 1

   Remove engine cover
   Locate and remove the two plastic cover screws securing the engine cover. Lift the engine cover straight up to disengage from the mounting grommets. Set cover aside.
   Torque spec

   Cover Screws14 Nm (10 lb-ft)
2. 2

   Remove air intake system
   Release the air box clips securing the air filter housing. Loosen the clamp on the intake tube at the throttle body. Disconnect the mass airflow sensor electrical connector by pressing the tab and pulling straight out. Remove the entire air intake assembly to provide access to the spark plugs.
   Torque spec

   Air Box Clips5 Nm (4 lb-ft)
3. 3

   Replace engine air filter
   Open the air filter housing and remove the old air filter element. Inspect the housing for debris and clean if necessary with a shop rag. Install the new air filter element ensuring it seats properly in the housing.
   ℹ️Note the direction of airflow arrow on the filter element for proper installation.
4. 4

   Disconnect ignition coils - Driver side
   Locate all four ignition coil-on-plug assemblies on the driver side bank (cylinders 1, 2, 3, 4). Disconnect each electrical connector by pressing the locking tab and pulling straight up. Label or note the cylinder positions if needed.
   ℹ️Work on one cylinder at a time to prevent mixing up ignition coil positions.
5. 5

   Remove ignition coils and spark plugs - Driver side
   Remove the single mounting bolt from each ignition coil using appropriate socket. Twist the coil gently while pulling straight up to remove. Inspect coil boots for damage. Use compressed air to blow out any debris from spark plug wells. Using the 5/8" spark plug socket, carefully remove each spark plug by turning counterclockwise. Remove plugs completely and inspect electrode wear and gap.
   ⚠Do not force spark plugs during removal. If resistance is felt, apply penetrating oil and allow to soak before attempting removal again.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
6. 6

   Install new spark plugs - Driver side
   Apply a small amount of anti-seize compound to the threads of each new spark plug (avoid getting compound on electrode). Thread each spark plug by hand into the cylinder head to prevent cross-threading. Once hand-tight, use torque wrench to tighten to manufacturer specification (typically 12-15 lb-ft for this application, though not provided in database - follow spark plug manufacturer instructions). Apply dielectric grease inside each ignition coil boot. Reinstall coils, secure with mounting bolts, and reconnect electrical connectors.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
7. 7

   Disconnect ignition coils - Passenger side
   Locate all four ignition coil-on-plug assemblies on the passenger side bank (cylinders 5, 6, 7, 8). Disconnect each electrical connector by pressing the locking tab and pulling straight up. Note that access may be tighter on this side due to component placement.
   ℹ️Passenger side may require removal of additional brackets or repositioning of wiring harnesses for better access.
8. 8

   Remove ignition coils and spark plugs - Passenger side
   Remove the mounting bolt from each ignition coil. Twist coils gently while pulling straight up to remove. Use compressed air to clean spark plug wells thoroughly. Using the 5/8" spark plug socket with extension, carefully remove each spark plug. Inspect old plugs for abnormal wear patterns that might indicate engine issues.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
9. 9

   Install new spark plugs - Passenger side
   Apply anti-seize compound to new spark plug threads. Thread each spark plug by hand to ensure proper seating. Torque to manufacturer specification using torque wrench. Apply dielectric grease to ignition coil boots. Reinstall coils, secure mounting bolts to specification, and reconnect all electrical connectors ensuring they click into place.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
10. 10

    Reinstall air intake system
    Position the air intake assembly back into place. Reconnect the mass airflow sensor electrical connector. Tighten the clamp at the throttle body securely. Close and secure the air box housing with all clips.
    Torque spec

    Air Box Clips5 Nm (4 lb-ft)
11. 11

    Reinstall engine cover
    Align the engine cover with the mounting grommets on the engine. Press down firmly to seat the cover onto all grommets. Install and tighten the two cover screws to specification.
    Torque spec

    Cover Screws14 Nm (10 lb-ft)

Reassembly

1. Double-check that all electrical connectors are fully seated and locked
2. Verify all tools have been removed from engine compartment
3. Ensure no loose fasteners or parts remain in engine bay

Verification

• Start the engine and verify it runs smoothly without misfires or rough idle
• Listen for any unusual noises that might indicate improper ignition coil seating
• Check that no warning lights are illuminated on the instrument cluster
• Verify there are no fuel or vacuum leaks around disturbed components
• Allow engine to reach operating temperature and confirm smooth operation throughout RPM range
• Scan for diagnostic trouble codes if check engine light appears

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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