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Home >> Mercedes Benz >> 1971 >> 280SL Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> MERCEDES-BENZ 1970-71 Engine Modification With Fuel Injection >> Operation >> 280 SL/8 With Automatic Transmission
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280 SL/8 With Automatic Transmission

Fuel shut-off solenoid, located on injection pump, is activated when the following conditions are met:

  1. When temperature switch in crankcase is open due to cooling water temperature being above 17°C (63°F).
  2. When accelerator pedal is in idling position. Idling speed switch, located on venturi control unit, is energized when accelerator pedal is in idling position.
  3. When engine speed is above 1250 RPM.
    NOTE: RPM switch, located on left wheel housing, is activated above 1250 RPM.
  4. When Automatic Transmission is in 3rd. or 4th. speed driving range. In 3rd. or 4th. speed driving range oil pressure switch on transmission as well as starter lock and backup light switch are de-energized.