Oxygen Sensor
- Warm engine to normal operating temperature and run engine at idle speed. Connect a Mulitmeter or Megameter between oxygen sensor connector (sensor side) and ground.
- Increase engine speed to 4000 RPM until reading indicates .7 volt. Increase and decrease engine RPM suddenly several times. When engine RPM is increased, reading should be .5-1.0 volt.
- When engine RPM is decreased, reading should be 0-.3 volt. If readings are not as specified, replace oxygen sensor.