Efianalytics -

Marco had always tuned by "feel"—richen this zone, pull timing there. But EFI Analytics had created a way to turn raw engine data into a story. He loaded a datalog of the Mustang's hot-restart stumble. Instantly, a sea of numbers—RPM, MAP, coolant temp, AFR—appeared on screen.

Marco stared at the screen. He had never noticed that the engine's fuel calculation was dropping off a cliff exactly two seconds after the hot restart—too fast for human eyes, but obvious to a machine that could scan 30 data points per second. efianalytics

The car had a brand-new electronic fuel injection (EFI) system, a Holley Terminator X. It started fine cold. It idled fine. But under a hard, hot restart, it stumbled, coughed, and died. Marco swapped sensors, checked fuel pressure, chased grounds. Nothing. Marco had always tuned by "feel"—richen this zone,