Only if they are outside of a predetermined range. However, if the throttle sensor stays with in this range, the PCM will just think the throttle is opening and closing. It was for these reasons and others that OEMs starting developing checks and balances in more modern cars.
Basically, they just added a second sensor that the PCM needs to see them in half of the other. This way the PCM can see if one sensor is out of range and it will set a rationality fault. Your truck does not have this. You have a throttle cable that attaches from the pedal to the throttle body and this sensor reads the movement of the throttle plate on the throttle body.
As you can see under the operation, the PCM will adjust fuel and ignition based on this sensor so if it is ranging up and down, the PCM will add and remove fuel which will bring the RPM's up and down. Stepping on the accelerator changes it but if the sensor sticks there, the RPM will remain high as you are describing.
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Tuesday, September 3rd, 2019 AT 8:21 PM