What is Voltage on tps 4.3l engine?

There's no single "voltage" for a 4.3L TPS (Throttle Position Sensor). The voltage output of a TPS is a variable voltage that changes depending on the throttle position.

* At idle: The voltage will be relatively low, typically in the range of 0.5V to 1.0V. This can vary slightly depending on the vehicle's make and model.

* Wide open throttle (WOT): The voltage will be at its highest, usually around 4.5V to 5.0V. Again, this can vary slightly.

* In between: The voltage smoothly increases proportionally to the throttle plate opening.

To find the *specific* voltage ranges for your particular 4.3L engine, you'll need to consult your vehicle's repair manual or a wiring diagram. The exact specifications will vary by manufacturer (GM, etc.) and even the year of the vehicle. Using a multimeter to measure the voltage at different throttle positions is the only way to know definitively what your TPS is outputting.