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Home >> Saturn >> 2002 >> L200 Automatic >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Diagnostics >> Restricted Exhaust System Check >> Test Method (Vehicle Parked)

Test Method (Vehicle Parked)

  1. Remove heated oxygen sensor.
  2. Insert exhaust Back Pressure Adaptor (SA9306E) into exhaust manifold. The thread designation is M18 x 1.50.
  3. Connect Gage Bar Kit (SA9127E), 0-15 kPa gage (0-60 in. H2O) to back pressure adaptor.
    Fig 1: Connecting Gage Bar Kit
    G01019221Courtesy of GENERAL MOTORS CORP.
  4. With engine at normal operating temperature, observe exhaust back pressure at 4000 RPM.
  5. The exhaust back pressure must be less than 5.0 kPa (20.13 in. H2O).
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