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Home >> Ford >> 2022 >> Mustang Mach 1 Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Exhaust System - 2.3L ECOBOOST (231KW/314PS)/2.3L ECOBOOST (257KW/350PS) - Mi4) >> Removal And Installation >> Exhaust Tailpipe Actuator >> Installation

Exhaust Tailpipe Actuator: Installation

WARNING: This page is about a different variant/trim than selected.
  1. Clean all exhaust connections before reassembly.
  2. NOTE: The top of the valve can be hand rotated to make sure it is moving freely and there are no restrictions inside the tailpipe tip.

    Turn the valve clockwise to fully open position as shown in illustration.

    GFD719696Courtesy of FORD MOTOR COMPANY
  3. NOTE: Before installing the spring and heat shield, inspect the valve flap within the tailpipe to make sure weld-beads are not causing restriction to proper flap motion.

    Inspect the valve flap inside the tailpipe tip.

  4. Install the spring and the heat shield onto the actuator.
    GFD719697Courtesy of FORD MOTOR COMPANY
  5. Locate the spring on the shaft as shown in illustration.
    GFD719698Courtesy of FORD MOTOR COMPANY
  6. NOTE: At this step, the spring does not have to sit on the shaft cap notch and may create a manual mechanical resistance when pushing the actuator.
    NOTE: The actuator spring will self-align in the shaft cap notch upon first key-on cycle.
    NOTE: Install the nuts finger tight at this stage.
    NOTE: Ensure the heat shield is located under the actuator.

    • Place and guide the actuator onto the mounting bracket, install back the cable guide bracket above the actuator.

    • Press the actuator down and loosely install the nuts finger tight.

    GFD719699Courtesy of FORD MOTOR COMPANY
  7. NOTE: RH side shown in illustration, LH similar.

    Tighten the nuts in sequence shown in illustration.

    Torque: 89 lb.in (10 Nm)

    GFD719700Courtesy of FORD MOTOR COMPANY
    1. Position the exhaust muffler assembly back in the vehicle.
    2. Position the hanger brackets and install the bolts.

      Torque: 22 lb.ft (30 Nm)

    GFD719701Courtesy of FORD MOTOR COMPANY
  9. Position the hanger brackets and install the bolts.

    Torque: 18 lb.ft (25 Nm)

    GFD719692Courtesy of FORD MOTOR COMPANY
  10. Remove the transmission jack. Use the General Equipment: Transmission Jack
    GFD719691Courtesy of FORD MOTOR COMPANY
  11. NOTE: Make sure the electrical wiring is routed with suitable clearance from the exhaust tips and the push pin clips are correctly installed.

    On both sides. Connect the exhaust tail pipe actuator electrical wiring harness clips to the vehicle body.

    GFD719690Courtesy of FORD MOTOR COMPANY
  12. On both sides. Connect the exhaust tail pipe actuator electrical connectors.
    GFD719689Courtesy of FORD MOTOR COMPANY
  13. Install the rear underbody shield.

    1. Install the rear underbody shield rear bolts.

      Torque: 80 lb.in (9 Nm)

    2. Install the rear under body shield push pin retainers.
    3. Install the rear underbody shield front bolts.

      Torque: 22 lb.ft (30 Nm)

    4. Install the rear under body shield rivet style push pin retainers.

    GFD719688Courtesy of FORD MOTOR COMPANY
  14. NOTE: PCM calibration will only work with \"Key-On\" (Engine Off state - Accessories On). Vehicle requires a push button once without starting vehicle (Key-On) for the PCM to start the calibration of the actuator.

    Follow below steps to mount and calibrate new actuator to the PCM.

    1. Turn off the vehicle: Key-Off period.
    2. NOTE: During the Key-Off period, ensure the doors are closed, the brake pedal is released and the vehicle is "asleep".
    3. Push the Key-On button.
    4. After Key-On, wait for 20 sec for calibration to start.
    5. The actuator will rotate the spring to the fully open and closed position which will cause the spring to fully seat in the shaft cap notch. An audible click can be heard.
    6. Wait for 20 more seconds in this state and then push-button to turn off (Key-Off).
    7. NOTE: During the Key-Off period, ensure the doors are closed, the brake pedal is released and the vehicle is "asleep"
    8. Push the Key-On button and start the engine.
    9. Change the Exhaust mode setting any mode that was not previously selected (i.e. Quiet--> Sport or Track--> Normal etc.) and select OK from the steering wheel. Check EXTUN related DTC or default messages.
    10. If there is no EXTUN related DTC or there is no \"Exhaust mode not available\" cluster message then the valve learning was successful. Otherwise repeat steps 1-5 one more time.
    11. NOTE: If there is an EXTUN related DTC or the \"Exhaust mode not available\" cluster message after repeating the steps 1-5 then mount a new actuator and try again.

      Turn off the vehicle. After Key-Off, when the vehicle is asleep, tighten the screws completely up to the specified torque. This process teaches the actuator to learn the closed and open 'end stop' positions.

    12. For more information Refer to: Electronic Engine Controls .

  15. After installation of the actuator, activate the drive modes via steering wheel or center console mounted exhaust switch on certain models and visually inspect the operation of the valves inside of the exhaust tips.

    1. In normal/weather drive mode (or quiet exhaust mode) both valves should be fully closed.
    2. In sport/track/dragstrip drive mode (or sports exhaust mode) both valves should be fully open.
    3. During the transition between modes, an audible difference in exhaust tone should be heard. Refer to: Electronic Engine Controls .

  16. Check the exhaust system for leaks.
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