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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1345 (Noise, Vibration & Harshness) >> Diagnosis And Testing >> Noise, Vibration and Harshness (NVH) >> Pinpoint Tests >> Pinpoint Test F: Drumming Noise

Pinpoint Test F: Drumming Noise

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. F1 CHECK THE EXHAUST SYSTEM 
      WARNING: If equipped with fire suppression system, depower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
    • With the vehicle in NEUTRAL, position it on a hoist. Refer to JACKING & LIFTING .
    • Key in START position.
    • Increase the engine rpm until the noise is the loudest. Note the engine rpm.
    • Key in OFF position.
    • Add approximately 9 kg (20 lb) of weight to the exhaust system. First place the weight at the tail pipe and test, then at the front pipe.
      Fig 1: Checking Exhaust System
      G04582680Courtesy of FORD MOTOR CO.
    • Key in START position.
    • Increase the engine rpm and listen for the drumming noise. Note the engine rpm if the noise occurs.
    • Key in OFF position.
    • Using a vibration analyzer (VA), determine the amount of vibration that occurs with the drumming noise.
    • Is the noise/vibration reduced or eliminated, or does the noise/vibration occur at a different rpm? 

    Yes  : CARRY OUT EXHAUST SYSTEM NEUTRALIZING . TEST the system for normal operation. If equipped with fire suppression system, GO to  F3.

    No  : GO to F2.

  2. F2 POWERTRAIN/DRIVETRAIN MOUNT NEUTRALIZING 

    Yes  : Vehicle OK. TEST the system for normal operation. If equipped with fire suppression system, GO to F3.

    No  : CONDUCT diagnosis of other suspect components. If equipped with fire suppression system, GO to F3.

  3. F3 REPOWER THE FIRE SUPPRESSION SYSTEM 
      WARNING: If equipped with fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
    • Verify that the fire suppression system is repowered. For additional information, refer to FIRE SUPPRESSION SYSTEM .
    • Is the fire suppression system repowered? 

    Yes  : Fire suppression system repowering is complete.

    No  : REFER to FIRE SUPPRESSION SYSTEM for fire suppression system depowering and repowering procedure.

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