[BLSTIC]

No, the circuit for the throttle position sensor doesn't work like that. The internal resistance of the computer and sensor is too high (and so current flow is too low) for a dropping resistor to function correctly. The part you are looking for is called a potentiometer (pot). The pot is a voltage divider, and they effectively split the voltage evenly between two sources and output that voltage on a third.

So cut the TPS output. Wire the TPS side of this wire to one end of the pot and *sensor* ground to the other (both wires are present at the sensor). Wire the ecu side of the cut wire to the wiper arm terminal (typically the middle one on knob-style pots).

You now have "standard TPS signal" at one extreme of adjustment and "computer sees the TPS as always closed" on the other. However that can effect open loop running (necessary for engine and cat converter health at high loads) and other things like a/c cut-out at high loads. But it will affect the kickdown on a fully computerised gearbox