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Home >> Volkswagen >> 1988 >> Fox Base >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH Cis-E >> Adjustments >> Airflow Sensor Plate >> Sensor Plate Clearance Adjustment
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Sensor Plate Clearance Adjustment

  1. Remove fuel distributor from airflow sensor housing. Turn distributor upside-down to access stop screw for control piston. Basic clearance between screw head and flange of hex nut should be .023" (.6 mm).
  2. Turning screw clockwise will increase clearance by keeping control piston higher in fuel distributor during operation. Turning screw counterclockwise will decrease clearance by allowing control piston to extend further out of fuel distributor during operation.
  3. Adjusting stop screw 1/4 turn will make .05" (1.3 mm) difference at sensor plate. Idle speed and CO (current reading) must be checked.
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