This Video will (generically) show you the ACC (Gas Pedal) Sensor "Chris" @christo849 is referring to in Post #3 The ACC Pedal Sensor actually has (3) Circuits to analyze: An (A) Circuit for Higher Voltage Referencing between (0-5) Volts DC ... A (B) Circuit which should diminish as the voltage increases on the (A) Circuit...and a (5) Volt Reference Circuit for the PCM to use as a Base Line when reading the changes as the Gas Pedal gets Depressed and Released... as well as Power and Ground connections within that slender Electrical Wiring Harness Connector.
The ACC Pedal Sensor PIDs can be observed using your Torque App...and with the Engine OFF and the Key set to On-Run, you should be able to see both (A) and (B) Voltages changing on screen as you Depress and Release the 'Gas Pedal'. The
ACC Sensor relates to the
Throttle Position Sensor while BOTH communicate their 'theoretical' positions...and the
PCM Decides from BOTH, along with other information... just how much Pulse Width and Duration of the EFIs is required to achieve 14.7:1 Stoichiometric Balance as the Engine Power Rises and Falls. Whether or not this is possible to perform depends upon the ACC Pedal vs. the TPS Positions AND the "Rate of Change" and Demand for Torque....with the Caveat of Performing these immediate Engine Running Conditions....SAFELY.
If there is ANY discrepancy within the
Redundant ACC Pedal Circuitry that threatens to cause a "Runaway Wide Open Throttle" Condition... The PCM will automatically reduce the Number of Cylinder Coil On Plug Firings... thereby cutting the engine power down enough (often suddenly) to Prevent an Accident with a possible Out Of Control Vehicle. There are a few other scenarios that also involve Power to the MAF Sensor being shunted that will likewise create a "Reduced Power" condition (for AWD and 4WD SUVs, too with TCCM Issues). But generally... The problem is between the Throttle Body Electronics, Connectors or Pigtails-Wires-Grounds going sideways... or a Bad ACC Pedal Sensor will also bring the Engine Power safely Down.
Gentlemen... Please remember
@Mounce 's recent observation about the value of using an Oscilloscope for Diagnosis . THIS is THE Signature Video concerning TPS and APP Problem Diagnosis. You will appreciate following this Lesson if you Download/Save/Review all this great information later on!:
Because the OP's Title involves the ongoing Battle between STFT and LTFT ...This Two Part White Board Instructional might break down many more aspects that can help sort things out here with additional clues at hand: