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System Tests: Starlet

  1. Disconnect 2 hoses from top of HAC valve. Blow air into each hose. Check that air flows into carburetor. Reconnect hoses.
  2. Remove check valve. Check that air flows from White pipe to Black pipe, but not in other direction.
  3. Remove distributor cap and rotor. Apply vacuum to diaphragm. Check that vacuum advancer moves in accordance with applied vacuum. Reinstall the rotor and distributor cap.
  4. Connect a vacuum gauge to distributor sub-diaphragm hose. Start engine and warm to normal operating temperature.
  5. If at high altitude, check that gauge indicates manifold vacuum and does not change when engine is accelerated.
  6. If at low altitude, check that gauge indicates high manifold vacuum and fluctuates when engine is accelerated.
Fig 1: Starlet High Altitude Compensation System
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