All contemporary cars are now equipped with fuel injection systems (FIS) replacing carburetors. The best fuel pump, also recognized as powertrain manage module (PCM), is the central unit of the engine management method of a car. It controls the generation and provide of air fuel mixture, ignition timing, idle speed, variable valve timing and emissions that are required for the engine to run. The Engine Manage Module also controls the FPR when the fuel pump is on. In short, Engine Manage Module (ECM) performs several functions that are necessary to operate a car.
The ignition switch does not provide the present required to operate the pump it supplies a smaller present which activates a relay which is designed for the pump operating current. It is frequent for the fuel pump relay to turn into oxidized and cease functioning this is considerably a lot more widespread than the fuel pump itself failing. Modern day engines use strong-state manage which enables the fuel pressure to be controlled with pulse-width modulation of the pump voltage. This increases the life of the pump, enables a smaller and lighter pump, and reduces the energy consumed by the pump.
When the driver turns the ignition important on, the powertrain control module (PCM) energizes a relay that supplies voltage to the fuel pump. The motor inside the pump starts to spin and runs for a few seconds to create pressure in the fuel system. A timer in the PCM limits how lengthy the pump will run until the engine starts.
