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Home >> Isuzu >> 1992 >> Pickup LS, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - CARBURETED >> Emission Systems & Sub-Systems >> Mixture Control Valve >> Mixture Control Valve (MCV) Inspection

Mixture Control Valve (MCV) Inspection

  1. Disconnect large rubber hose (1) connecting MCV and intake manifold. See Fig 1 . Plug intake manifold side.
  2. If MCV is functioning properly, secondary air should continue to blow from MCV for a few seconds when throttle is opened completely and released quickly. If secondary air continues to blow out for more than 5 seconds, replace MCV.
Fig 1: Cross-Sectional View of Mixture Control Valve
G122347Courtesy of ISUZU MOTOR CO.
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