LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2103 (Exhaust System) >> Diagnostic Tests >> Exhaust System >> Pinpoint Test >> Pinpoint Test A: Drumming Noise

Pinpoint Test A: Drumming Noise

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 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: Exhaust System
      GF0000027Courtesy 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  : REFER to Exhaust System Alignment . TEST the system for normal operation.
    2. NO  : CONDUCT a diagnosis on other suspect systems. REFER to NOISE, VIBRATION AND HARSHNESS article.
scientia non olet · About LEMON Manuals