whose web site mentioned repair parts? I'd like to know so I can also search for them.

The common failure is the wire insulation inside the wiring bundle attached to/integral with the throttle actuator.

The throttle cable merely moves a variable resistor which tells the engine control system to 'give me more power'. The actual throttle opensing in then determined by the engine management system--which tells the motor that drives the throttle plate, to open up. The actuator also contains a position sensor variable resistor that allows the engine management computer to determine the throttle blade position and verify that it is where it is supposed to be. If that senros position does not match what it is supposed to be it goes into 'limp' mode.