Tps

[SappySE107]

This is actually just a potentiometer (variable resistor, sometimes called a rheostat), by turning the throttle body plate it rotates a shaft in the sensor causing different voltages to output. There are 3 wires: ground, +5V, and the sensor output. The different resistances caused by the rotating shaft vary the voltage output on the sensor output wire, the ECM then measures this voltage to determine how far the throttle is open. The sensor is located on the throttle body opposite the throttle lever.

0% throttle is usually about .5V and 100% throttle is around 4.5V

[Chad]

tps

what exactly happens when you are adjusting the tps? How do you know when it is adjusted?

[SappySE107]

You don't adjust it to make it do anything "Better". You are only setting the initial voltage for 0% throttle. If you move it around for whatever reason, you should reset the computer so that it will reset itself for 0% throttle vs voltage.

[85_Olds_Ciera]

Tidbit - When vehicle is running on default map, say EGR/O2 not working, this map may cause a hesitation point(s) in acceleration or at some steady speed traveled.

Hence, one should not replace the TPS when a fault code is present...unless one travels down the road of hard knocks.