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Home >> GMC >> 1981 >> Magnavan Automatic Trans, Trans Mfr CD 400/M40 >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> ROCHESTER Models M4MC & M4ME 4-Barrel >> Front Vacuum Break >> Secondary Opening Linkage

Secondary Opening Linkage

  1. Open primary throttle valves until secondary throttle link just contacts tang on secondary throttle lever. See Fig 1.
  2. Link should be centered in slot of secondary throttle lever. To adjust, bend tang on secondary throttle lever.
Fig 1: Measuring Secondary Throttle Opening Linkage
G09337077Courtesy of GENERAL MOTORS COMPANY