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Throttle Valve Switch

  1. Connect Bosch Tester and set switch "A" to "Measuring" position. Set switch "B" to "Throttle Valve Switch III" position.
  2. Loosen screws to turn throttle valve switch. Mark intake duct at upper screw and turn throttle valve switch clockwise as far as possible. Then slowly turn it counterclockwise until the pointer on the instrument goes from infinity to zero. Then turn a further 1 ° (1/2 graduation mark on scale at upper attaching screw). Tighten throttle valve switch.
  3. Make sure that instrument pointer goes to infinity when throttle valve opens about 1°. (Place 0.02 in. feeler gauge between stop screw and stop on throttle valve spindle.) Change to a 0.012 in. feeler gauge. The pointer should not read infinity.
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