Today, when I go out in sub-zero winter weather to start my econo-box, I sometimes think of the time I spent rebuilding Holly, Rochester, or Stromberg carburetors–of making sure not to drop tiny springs or check-balls, of bending stamped parts to templates in the rebuild kit to ensure proper choke pull-off during engine warm-up. Hooking up the warm-up line to the choke stove on the manifold (if it hadn't rusted completely away!). Then I turn the key. The engine cranks and fires. The stepper-motor controlling idle speed quickly moderates the initial fast idle as the engine warms. Mixture is controlled, not by furiously trampling the gas pedal as a pump, but by unseen sensors and software. I drive away–without coughing, spitting, or having to become for the moment the engine management system.