sitting on her workbench. To anyone else, it was a silver box with a mess of wires; to her, it was an —the brain that had finally gone dark.

: The "muscles." Pins 40-46, which told the fuel injectors exactly when to spray and the spark plugs when to fire.

The garage shook as the turbine roared to life, a terrifying mix of a jet engine’s whistle and a muscle car’s growl. Elias watched the live data stream on his laptop; every sensor was reporting perfectly, every pin was doing its job. The design held.

Measures exhaust gas composition for closed-loop fuel corrections. Actuator Outputs (Control Lines)

Notes:

Connect all pins to Power Supply Negative (-).