Definition
ECU maps define fuel and timing targets across rpm and load.
Reflashing or standalone ECUs unlock custom tuning for modified engines.
Automotive Wiki
Electronics
ECU
Engine control unit — the computer managing fuel, ignition, and emissions parameters.
Related terms
- OBD-IIOn-board diagnostics standard providing standardized trouble codes and sensor da…
- MAP SensorManifold absolute pressure sensor reporting boost or vacuum to the ECU.
- MAF SensorMass airflow sensor measuring incoming air mass for fuel delivery calculations.
- Knock SensorA sensor detecting engine knock (detonation) so the ECU can retard timing.
- CAN BusController area network — the digital communication backbone linking vehicle mod…
- Wideband O2 SensorA high-accuracy oxygen sensor reporting precise air-fuel ratio for tuning.
Category: Electronics · Updated August 31, 2026