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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1063 (Noise, Vibration And Harshness) >> Diagnostic Tests >> 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 2007 Lincoln MKX and 2007 Ford Edge. 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.
      • Fig 1: Locating Tail Pipe & Front Pipe
      GF0000027Courtesy of FORD MOTOR CO.
    • 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 exhaust pipe.
    • 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 electronic vibration analyzer (EVA), 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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