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Reply to "subie engine thoughts"

I'm also interested in learning more about the throttle pedal being electronically connected to the engine vice the old-fashioned way?



Old way: throttle cable directly connected to throttle body.

New way: Gas pedal has a potentiometer(variable resistor) and a heavy spring.

Throttle body has a stepper motor attached directly to drive the throttle plate.

Electronic controls and wires in-between the two, hence drive-by-wire. The benefit is possibly quicker throttle response and other things that mileage misers(EPA) want. The idle speed control is super easy this way with the throttle controlled by the ECU.

Last edited by DannyP
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