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Mazda RX-7 FD

Which idle screw should I adjust on a Mazda RX-7 FD?

Updated June 2026

For your Mazda RX-7 FD, you need to adjust the idle bleed screw, which is located underneath the bottom of the throttle body 4.

To adjust the idle speed:

  • Turn the screw to the right to lower the idle.
  • Turn the screw to the left to raise the idle 4.

Make sure you do not mistake it for the fast idle cam screw, which is also located on the throttle body assembly. The fast idle cam screw only dictates the idle speed when the car is cold (typically around 1500 RPM) before it drops as the engine reaches operating temperature 4.

Difficulty: Easy

This answer was generated by GarageBot's AI from enthusiast forum discussions. Always verify torque specs and safety-critical procedures against the factory service manual before working on your car.

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