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Home >> BMW >> 1978 >> 530i Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Fuel Delivery >> Fuel Injection - BOSCH AFC - EUROPEAN Models >> Adjustments >> Throttle Valve Switch >> 1976-78 BMW & Renault

1976-78 BMW & Renault

  1. Throttle valve switch should start to operate when throttle valve is opened 2 degrees from its normally closed position.
  2. To adjust throttle valve switch use Tester (0684100202) on BMW, Tester (EFAW 228S 10) on Renault. Use manufacturer's instructions on tester for correct switch positions.
  3. Readings on tester should indicate zero resistance at idle, infinity at part throttle, and zero resistance at full throttle. If not, loosen throttle switch screws.
  4. Rotate throttle switch clockwise until needle on tester moves from an infinity reading to a zero reading, then rotate throttle switch counterclockwise one graduation (2 degrees). Tighten throttle valve switch and check for proper operation.
NOTE: On 1978 BMW 733i, the angle between idle cut-in position and idle stop on switch should be 4.5 degrees. Full throttle angle, between idle stop and full throttle cut-in, should be 62 degrees.