How do you adjust the Throttle Position Sensor on a 1990 Mazda RX-7?
in front face of the trottle body you will see the TPS (Trottle Positioning Sensor). To the right of it will be bracket which is hooked to the throttle values. There is a spring loaded screw which you can turn with a flat-head.
i have a 1996 Mazda protege and it is at the rear of the transmission if you're looking from the front drivers side. it is almost directly under the throttle position sensor which is located on the rear of your throttle body close to the firewall (almost directly in the center of the engine compartment).
Unplug the electrical harness from the Throttle body, it's the side opposite of the circular spring and throttle cable assembly. The Throttle Position Sensor (TPS) is the grey and black plastic item the harness is connected to. It is held in with two small, Phillips head screws. Just remove the screws and it will pull right off.