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Home >> Isuzu >> 1990 >> Impulse Automatic >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Carburetor (2.3L) >> Fast Idle Opening Angle Adjustment

Fast Idle Opening Angle Adjustment

  1. Close choke valve to fully closed position. Align fast idle adjusting screw on first (high) step of fast idle cam. See Fig 1 .
  2. Measure clearance between primary throttle valve and throttle valve chamber wall. Clearance should be .048-.058" (1.23-1.47 mm). Primary throttle valve angle should be 25 degrees. If clearance is not as specified, adjust using fast idle adjusting screw.
Fig 1: Adjusting Fast Idle Opening Angle
G93358Courtesy of ISUZU MOTOR CO.