EFI gasoline injector device is a key component, which controls the ultimate jet fuel, if a problem, the engine work will be normal or not immediately stop working.

Jet carburetor installed in the original position, combined with the throttle, this form is called the single-point electronic-controlled fuel injection, it has the advantages of low cost and simple maintenance, and is due to shortcomings with the cylinder injection point ranging from the result of uneven distribution of fuel, cold-starter, easily fuel in the intake pipe wall adhesion.

Jet installed in each cylinder intake manifold, this form is called multi-point fuel injection control device, and is currently the most gasoline engines used in the form of EFI. It has the advantages of each cylinder has its own jet, the jet intake valve as close as possible to avoid a single point of Electronic Fuel Injection flaws and shortcomings is the high cost of maintenance complex.

At present the majority of automotive engines have adopted multi-point EFI form, but also a small number of types of vehicles using single-point EFI form. If the old carburetor engine will be converted into a single-EFI EFI point form.