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Switching Solenoid Valve Signal Check (Non-Turbo)

  1. Install tachometer. Warm engine to normal operating temperature and allow to idle. Disconnect hose at switching solenoid valve. See Figure . Place finger over port.
  2. Slowly increase engine speed, noting that air is drawn into valve port. Disconnect throttle sensor connector. Slowly increase engine speed, noting that air is not drawn into valve port when engine speed exceeds 1000-1200 RPM.
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