LN7 L4-098 1.6L VIN 4 2-bbl (1982)
Throttle Plate - Carb.: Description and Operation
Fig. 3 Carburetor secondary progression system
Operation
This system is similar to the primary main metering system.
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When the primary throttle plate is opened approximately 45°, the secondary throttle plate begins to open, Fig 3.
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The air/fuel mixture begins flowing from the secondary transfer holes as they are exposed to manifold vacuum.
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As the throttle plates are opened further, the secondary main metering system begins to operate.
