Fuel pressure from the fuel pump and a signal from the ECM (Engine Control Module) to open.
Fuel injection service generally means running a cleaning solution through your fuel system. It removes the carbon buildup and makes the injectors spray more effectively.
It has a Better spray pattern and also will inject fuel in the open intake valve (indirect injection).
MFI is an acronym for Multiport Fuel Injection. An MFI Fuel System is a fuel injection system that uses one injector per cylinder, mounted on the engine to spray fuel near the intake valve are or the combustion chamber.
Assuming that you are asking about fuel injection, fuel injection is an alternative to using a carburetor to get the fuel to the cylinders. There are several different types of fuel injection. Probably the three most common are throttle body fuel injection, port fuel injection and direct fuel injection. Throttle body fuel injection uses something that looks a good deal like a carburetor but has one, two or more electrical operated solenoid valves that spray a metered amount of fuel into the incoming combustion air. Port fuel injection is similar but the fuel is injected into the intake manifold port of each cylinder. Port fuel injection can provide improvements in emissions, fuel economy and performance if done correctly. Both throttle body and port fuel injection are low pressure systems. Direct fuel injection injects the fuel directly into the combustion chamber and is a high pressure system. Direct fuel injection can provide even more improvement in emissions, fuel mileage and performance and is becoming more and more common in passenger vehicles. As a further note, most, if not all, compression combustion (like a diesel engine) engines use high pressure direct fuel injection.
Throttle body injection has one injector located in the throttle body that supplies fuel to the intake manifold. This fuel flows to all cylinders just like it does on a vehicle with a carburetor. Port injection uses tubes with poppet valves from a central injector to spray fuel at each intake port rather than the central throttle body.
You can start the fuel injector but is going to do nothing without fuel. Without gasoline being pumped to the injector is will not spray fuel and the engine will not run. Every internal combustion engine must have some sort of fuel pump.
there is a problem with your fuel injection injectors, most of the time i get dirty and need to be cleaned
It can be given orally or as an injection.
Carburetor, mechanical fuel injection, throttle body electronic fuel injection, ported electronic fuel injection,
Fuel injection
fuel injection controlled by a cpu
fuel injection