# rusefi/rusefi

rusefi - GPL internal combustion engine control unit

Repository: https://github.com/rusefi/rusefi
Canonical: https://ross.abutalabs.com/products/rusefi
Homepage: http://rusefi.com
Language: C
License: NOASSERTION
License Family: other
Topics: stm32f4, gpl, java, c-plus-plus, embedded, racing, rusefi, automotive, stm32f7
Last push: 2026-09-03T01:04:28+00:00

## Health v2 (maintenance only)
Score: 91/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 73, longevity 100
- inputs: {"age_days": 4516, "days_push": 0, "days_rel": 20, "gap_med": 128, "n_releases_24m": 6}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1147, forks 413 (observed 2026-09-03T02:15:17.557144+00:00)

## What it is
rusEFI is a GPL open-source internal combustion engine control unit (ECU) project, including STM32 firmware, KiCAD hardware designs, a Java-based tuning console, and a firmware simulator. It supports sequential fuel injection, ignition control, wideband oxygen sensing, CAN bus, Lua scripting, and many other engine management features for up to 12-cylinder engines.

## Use cases
- control fuel injection and ignition on a DIY standalone ECU
- convert a carbureted or stock ECU engine to programmable standalone engine management
- tune fuel and ignition tables with TunerStudio or the rusEFI console
- simulate ECU firmware on Windows or Linux without hardware
- add traction control, launch control, antilag, or boost control to a race car
- log wideband AFR and engine data over CAN bus
- customize engine control behavior with Lua scripting

## When to choose
- you want a fully open-source, hackable standalone ECU with active community support
- you need flexible engine management for up to 12 cylinders with sequential injection and ignition
- you want to modify or extend ECU firmware or hardware yourself
- you need features like flex fuel, staged injection, knock sensing, or automatic transmission control

## When to avoid
- you need a plug-and-play ECU with no wiring, configuration, or tuning effort
- you require guaranteed commercial support or certification for street-legal emissions compliance
- your project depends on injectors or hardware not supported by the firmware (e.g., low-impedance injectors without proper drivers)

## Facets
- artifact type: application
- maturity: active
- function: embedded, simulation, developer-tools, monitoring
- domain: embedded-systems, hardware
- platform: embedded, cross-platform, jvm, cpp, c
- tags: ecu, engine-management, firmware, automotive, stm32, fuel-injection, ignition-control, tuning-software, real-time-operating-system, can-bus, motorsport

## Member repositories
- rusefi/rusefi (main) score 91

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:17.557144+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:34:12.576588+00:00, confidence not recorded.
  - readme: https://github.com/rusefi/rusefi (fetched 2026-09-03T02:15:17.557144+00:00, sha e9f567e2dc8f)
  - homepage: http://rusefi.com (fetched 2026-08-29T12:39:34.396872+00:00, sha 9536b2c29e7f)
  - site_page: https://rusefi.com/docs/guide (fetched 2026-08-29T12:39:34.409715+00:00, sha 260259a399ac)
  - site_page: https://wiki.rusefi.com/FAQ-Basic-Wiring-and-Connections (fetched 2026-08-29T12:39:34.406806+00:00, sha 362d8fcadf8a)
- Data as of 2026-08-30T08:39:29.467469+00:00.