Archive for May 2026

The Short Answer: There are several types of fuel injection systems, but the four main ones are throttle body injection (TBI), multi-point fuel injection (MPFI), sequential fuel injection (SFI), and direct injection. Each one delivers fuel differently, and the right choice depends on your build. For most classic car and hot rod EFI conversions, throttle…

The Short Answer: An ECU (electronic control unit) is the brain of your EFI system. It reads sensor data in real time and controls fuel injection, ignition timing, and idle speed to keep your engine running right across every operating condition. You hear the term ECU a lot when you start looking into EFI systems,…