What is EFI?

Electronic fuel control injection is the engine's * * * system, which is mainly composed of ECU and fuel injection pump. Electronic components issue instructions, and mechanical components execute instructions. At present, it is mainly divided into single-point EFI and multi-point injection in-cylinder direct injection.

There are great differences between EFI engine and carburetor engine, and their operation methods are also very different. When EFI engine starts (including cold start), it is generally unnecessary to step on the accelerator. Because the EFI engine has the functions of cold start and enrichment, automatic cold start and fast idle, the engine can be started smoothly whether it is cold or hot. Before and during the engine start-up, it is ineffective to repeatedly and quickly step on the accelerator pedal to increase the fuel injection amount like starting a carburetor engine. Because the accelerator pedal only controls the throttle opening, the fuel injection quantity of EFI engine is completely determined by the computer according to the intake parameters. When the fuel tank is short of oil, the EFI engine should not run for a long time. Because the electric gasoline pump is cooled by the fuel flowing through the gasoline pump. Running the engine for a long time without oil in the fuel tank will cause the electric gasoline pump to burn out due to overheating, so if your car is an EFI car, you should refuel as soon as possible with the fuel warning light on the dashboard. Do not unplug any sensor plug when the engine is running, otherwise there will be artificial fault codes in the computer, which will affect the correct judgment and troubleshooting of maintenance personnel.