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Home >> BMW >> 1978 >> 530i Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Tune-Up Procedures - 6-Cylinder >> Idle Speed & Mixture >> 633CSi & 733i

633CSi & 733i

  1. Disconnect hose from throttle housing-to-charcoal canister, but DO NOT plug throttle housing port or hose. Disconnect air injection hose from air pump. Adjust engine speed to specified RPM by turning adjusting screw located below throttle butterfly switch.
  2. Adjust CO% value to specifications by turning the adjusting screw in the lower side of the air flow meter. Turning adjusting screw clockwise increases CO% value, turning it counterclockwise decreases CO% value.
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