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Home >> GMC >> 1989 >> Forward Control 4.8 T, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Carburetor - ROCHESTER 1MEF 1-Bbl >> Adjustment >> Choke Unloader

Choke Unloader

  1. Install choke coil in housing and index properly. If choke is warm, cool down to point where choke valve will fully close.
  2. Hold throttle valve wide open. Measure clearance between lower edge of choke valve and inside air horn wall, using specified drill or pin gauge. To adjust, bend choke unloader tang to achieve specified clearance. See Fig 1.
Fig 1: Adjusting Choke Unloader
G8652Courtesy of GENERAL MOTORS CORP.