1982 Mazda RX-7 GSL, Automatic TransFACTORY OEM SERVICE PROCEDURE

Throttle Sensor

  1. Warm engine to normal operating temperature. Stop engine. Connect tachometer to engine. Disconnect throttle sensor electrical connector, located on right side of engine (Black/Yellow and Green/Black wires).
  2. Using 2 voltmeters, connect positive lead of one voltmeter to Light Green/Yellow wire terminal of throttle sensor check connector. Connect positive lead of other voltmeter to Green/Yellow wire terminal of throttle sensor connector. Connect negative terminals of both voltmeters to good ground. See Fig 1.
    Fig 1: Testing Throttle Sensor
    G09323261Courtesy of MAZDA MOTORS CORP.
  3. Start engine and run at 3000 RPM. Quickly decelerate engine. Current should flow to both terminals simultaneously when engine speed is 1000-1200 RPM. If current does not flow to both terminals at the same time, remove cap from throttle sensor adjusting screw and adjust throttle sensor.
  4. Adjust timing of current flow to voltmeter "A" in Fig 1 by turning throttle sensor adjusting screw. Turning screw in causes current to flow to Light Green/Yellow wire at lower engine speed. After adjustment, install cap on throttle sensor adjusting screw and retest throttle sensor.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.