I read a method where u build some test lights for checking the TPS...but there is this OTHER way, where you can use 2 voltmeters. I got 2 voltmeters, so does anyone know how to TEST it that way and what the procedure is?

 

the voltmeters will show a reading when the lights would normally have come on.

so watch for that.

heres the procedure for using lights (same procedure)
read the RX-7 2Nd GEN FAQ


1) Warm up the engine, then stop it.

2) Connect the checker lamp to the check connector (green).

3) Turn the ignition switch on and check whether one of the lamp illuminates.

4) If both lamps illuminate or if neither does, turn the throttle sensor adjust screw until one of the lamps illuminates.

a) If both lamps illuminate turn the adjust screw clockwise.

b) If both lamps do not illuminate turn the adjust screw counterclockwise.


I'd just like to add that I found the best results by turning the screw counter-clockwise until I obtained condition 4)a) above (both lit) then I turned the screw clockwise until one light went out + 1/8 turn of the screw. This assures the throttle is as close to actually closed as possible when the sensor indicates that condition to the computer. (Thus giving you the smoothest transition on/off idle.)