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Home >> Nissan-Datsun >> 1982 >> 280ZX Base, 2.8L Eng VIN C, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electronic Concentrated Engine Control >> Testing >> Component Testing >> Oxygen Sensor
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Oxygen Sensor

  1. Connect all wiring and battery cables. Start engine and warm to normal operating temperature. Open hood and run engine at 2000 RPM for 5 minutes.
  2. If engine does not run smoothly, check air flow meter, cylinder head temperature sensor and air temperature sensor.
  3. Accelerate engine several times, then check idle. If not 600-700 RPM in "D", check vacuum control modulator and idle speed control system.
    NOTE: Special ECCS tester is required for idle speed system check.
  4. Check timing. If not 17-23° BTDC, adjust to 20° BTDC with adjustment screw on crankshaft sensor bracket (loosen sensor bolts first).
  5. Using a mirror, check that inspection lamp on bottom of control unit goes on and off more than 5 times in 10 seconds with engine running at 2000 RPM in "N".
  6. If so, sensor is okay. If not, check oxygen sensor harness. If harness if okay, replace oxygen sensor.
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