FixVault

Fast Idle

With choke fully closed, angle of throttle valve and clearance between lower edge of throttle valve should be as shown in Fast Idle Specifications table. Using a suitable wire gauge or drill bit, check clearance and adjust by bending fast idle rod.

Fast Idle Specifications

Application Angle A Clearance B
1971 RX-2 15° .045"
1972 RX-2, RX-3 16.5° .047"
1973 RX-2, RX-3
  Std. Trans. 15.5-18.5° .046-.062"
  Auto. Trans. 16-19° .048-.062"
Fig 1: Fast Idle Adjustment
G09313613Courtesy of MAZDA MOTORS CORP.