LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2021 >> Edge ST >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Fuel Charging And Controls - Turbocharger - 2.7L ECOBOOST (238KW/324PS) >> Diagnosis And Testing >> Turbocharger >> Pinpoint Test B: Excessive Noise

Pinpoint Test B: Excessive Noise

  1. Possible Sources 

    • Air intake system
    • Engine
    • Turbocharger

  2. B1 COMPARE CUSTOMER CONCERN TO A KNOWN GOOD VEHICLE

    • Compare the customer concern to a known good vehicle. Variations in vehicle options such as engine size, transmission or tire size will sound different. Compare to a vehicle similarly equipped. Compare the vehicle under similar driving conditions, like road test route, APP and load.

    Is the noise excessively different from the comparison vehicle? 

    Yes  GO to  B2
    No  The sound is a normal characteristic of the vehicle.

  3. B2 LOCATE THE SOURCE OF THE NOISE

    • Using the Chassis/Ear, Engine/Ear, and VCMM accelerometers along with the scan tool, locate the source of the noise. REFER to: ENGINE

    Is the noise located near the turbocharger? 

    Yes  GO to  B3
    No  The turbocharger is not the source of the noise. REFER to ENGINE

  4. B3 CHECK THE AIR INTAKE SYSTEM

    • Check the air intake system, air cleaner and CAC components, ducts, pipes and hoses. Check that all components are installed correctly and tight. Check that all components are aligned correctly. Check for damage that could cause an air-intake leak resulting in a noise from the turbocharger(s). For additional information, refer to the appropriate Intake Air Distribution and Filtering service information

    Does the air intake system have any leaks? 

    Yes  Repair as necessary. For additional information, refer to the appropriate Intake Air Distribution and Filtering service information
    No  GO to PINPOINT TEST C 
    Check the turbocharger(s) for damage that could result in a noise.
scientia non olet · About LEMON Manuals