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Home >> Volkswagen >> 1987 >> Vanagon Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> BOSCH AFC System >> Adjustments >> Throttle Valve >> Basic Adjustment

Basic Adjustment

  1. Turn adjusting screw outward until gap exists between stop and adjusting screw. Place small piece of paper between screw and stop. Slide paper back and forth while turning screw inward.
  2. When screw contacts paper, turn adjusting screw an additional 1/2 turn clockwise. Check idle speed and CO reading.
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