Throttle Body

Remove and replace the throttle body assembly on the 5.0L Coyote V8 engine, including air intake system components and electrical connections.

Warnings

Tools required

Parts

• Throttle body assembly × 1 — Motorcraft CM5312 or equivalent
• Throttle body gasket × 1 — Use OEM specification
• Air intake hose clamps (if damaged) × 2 — Use OEM specification

Preparation

1. Ensure engine is completely cool to the touch
2. Park vehicle on level ground and engage parking brake
3. Disconnect negative battery cable using 10mm wrench and secure away from terminal
4. Wait minimum 5 minutes for capacitors to discharge
5. Locate throttle body on top of engine intake manifold, driver side
6. Take photo of air intake routing for reference during reassembly

Procedure

1. 1

   Remove Engine Cover
   Grasp engine cover firmly and pull upward to disengage rubber grommets from ball studs on valve covers. Set cover aside in clean area.
2. 2

   Disconnect Air Intake Assembly
   Loosen the clamp at the air filter housing outlet using flathead screwdriver. Loosen the clamp at the throttle body inlet. Disconnect crankcase ventilation hose from air intake tube by squeezing spring clamp and pulling hose free. Remove entire air intake tube by pulling away from throttle body and air filter housing.
   Torque spec

   Air Intake Hose Clamps3 Nm (2 lb-ft)
3. 3

   Disconnect Throttle Body Electrical Connector
   Locate electrical connector on right side of throttle body. Press down on red safety tab to unlock. Squeeze connector release tabs and pull connector straight off throttle body. Move wiring harness aside.
4. 4

   Remove Throttle Body Mounting Bolts
   Using 8mm socket and extension, remove the four throttle body mounting bolts in a crisscross pattern. Keep bolts organized for reinstallation. Note that bolts may be different lengths; mark positions if necessary.
   ℹ️Throttle body bolts may be 10.0 Nm or 16.0 Nm depending on model year - verify during removal
   Torque spec

   Throttle Body Bolts10 Nm (7 lb-ft)
5. 5

   Remove Throttle Body
   Carefully pull throttle body away from intake manifold. Twist slightly if needed to break gasket seal. Remove and discard old throttle body gasket from intake manifold surface. Inspect throttle bore and plate for carbon buildup.
6. 6

   Clean Mounting Surfaces
   Using clean lint-free rag, thoroughly clean intake manifold mating surface. Remove all gasket material and debris. Spray brake cleaner on rag (not directly on manifold) and wipe surface until completely clean. Ensure no debris falls into intake manifold opening; stuff clean rag into opening temporarily if needed.
   ⚠Do not allow debris or cleaning materials to enter intake manifold as this will cause engine damage
7. 7

   Inspect and Clean New Throttle Body
   Remove new throttle body from packaging. Verify gasket surfaces are clean. Do NOT open throttle plate manually. Check that electrical connector pins are straight and undamaged. If reusing old throttle body, clean bore and plate with throttle body cleaner and lint-free cloth.
8. 8

   Install New Gasket and Throttle Body
   Position new throttle body gasket onto intake manifold, aligning all four bolt holes. Remove protective rag from intake if used. Carefully position new throttle body onto gasket, ensuring gasket remains aligned. Start all four mounting bolts by hand to ensure proper thread engagement.
9. 9

   Torque Throttle Body Bolts
   Using torque wrench, tighten throttle body bolts in crisscross pattern (top left, bottom right, top right, bottom left) to 10.0 Nm (7.4 lb-ft) for 2015-2017 models or 16.0 Nm (12.0 lb-ft) for 2018-2020 models. Make second pass in same pattern to verify all bolts reach specification.
   ⚠Over-torquing throttle body bolts can crack throttle body housing or distort bore
   Torque spec

   Throttle Body Bolts10 Nm (7 lb-ft)
10. 10

    Reconnect Electrical Connector
    Push electrical connector onto throttle body until it clicks into place. Verify red safety tab engages properly. Gently tug on connector to confirm it is fully seated and locked.
11. 11

    Reinstall Air Intake Assembly
    Position air intake tube onto throttle body inlet and air filter housing outlet. Ensure tube is fully seated on both connections. Reconnect crankcase ventilation hose to intake tube, ensuring spring clamp is properly seated. Tighten both hose clamps to 5.0 Nm (4.0 lb-ft) using torque wrench.
    Torque spec

    Air Intake Hose Clamps3 Nm (2 lb-ft)
12. 12

    Reinstall Engine Cover and Reconnect Battery
    Align engine cover grommets with ball studs on valve covers and press down firmly until cover snaps into place. Reconnect negative battery cable and tighten to specification using 10mm wrench.

Reassembly

1. Double-check all hose clamps are tight and oriented correctly
2. Verify electrical connector is fully locked with safety tab engaged
3. Confirm engine cover is fully seated on all mounting points
4. Ensure no tools or rags were left in engine bay

Verification

• Turn ignition to ON position without starting engine; verify check engine light illuminates then extinguishes (normal bulb check)
• Start engine and verify it idles smoothly without stalling after initial rough idle period
• Verify no air leaks around throttle body or intake connections by listening for hissing sounds
• Rev engine gently to 2000-3000 RPM and release; throttle should respond smoothly without hesitation
• Check for diagnostic trouble codes using OBD-II scanner; clear any codes related to battery disconnect
• Test drive vehicle through several drive cycles to allow PCM to relearn idle and throttle parameters
• After 50 miles, verify no check engine light and smooth throttle response throughout RPM range

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