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Home › Nissan-Datsun › 1981 › 280ZX Base, 2.8L Eng VIN C, Automatic Trans › Repair and Diagnosis › Engine Performance › Engine Control Systems › Mixture Ratio Feedback System › Testing › Component Testing › Air Regulator

Air Regulator

  1. Connect ohmmeter between pin 108 in control unit connector and ground. Resistance should be 25-90 ohms.
  2. Connect battery ground cable and leave starter "S" wire disconnected. Turn ignition to "START" position. Using a voltmeter, measure between terminals 108 in control unit connector and ground. Battery voltage should be present. If not, go to next step.
  3. Fuel pump should operate for 5 seconds with ignition on and engine not running. If pump is not heard, check pump relay. If pump is heard, go to next step.
  4. Start engine and pinch hose between throttle chamber and air regulator. Engine speed should decrease during warm-up but not when engine is at operating temperature. Disconnect hoses from both ends of regulator and see if flap opens. It should move smoothly. Check resistance across terminals on regulator. If continuity exists, regulator is good. If not, replace regulator.
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