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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 445 (Noise, Vibration & Harshness) >> Diagnosis And Testing >> Pinpoint Tests >> Pinpoint Test F: Drumming Noise

Pinpoint Test F: Drumming Noise

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. F1 CHECK THE EXHAUST SYSTEM 
    • 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: Placing Weight At Tail Pipe And Test Front Pipe
      G03272048Courtesy 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? 
    1. Yes  : CARRY OUT EXHAUST SYSTEM NEUTRALIZING  . TEST the system for normal operation.
    2. No  : GO to F2.
  2. F2 POWERTRAIN/DRIVETRAIN MOUNT NEUTRALIZING 
    1. Yes  : Vehicle OK. TEST the system for normal operation.
    2. No  : CONDUCT diagnosis of other suspect components.
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