Below we list the main factors that could explain low fuel pressure. To achieve this you will need a pressure gauge or an automotive scanner depending on the year and model of your car. Remember, any change to the electric fuel pump will require modifying the rest of the fuel system, as well as making the necessary adjustments to the engine (calibrating high-pressure fuel pump on DI systems) and recalibrating the on-board computer.Д¬hecking fuel pressure is always a good idea. Contrary to what many people think, a larger capacity pump is not always a good idea. The recommendation that we give you at MikeвЂ™s Carburetor Parts is that when replacing a fuel pump, always check that it is 100% compatible with your vehicle. In modern DI systems, this function is accomplished by fuel pressure sensors that allow the computer to adjust the fuel pump speed when necessary. In traditional MPI (Multi-Port Injection) systems this regulation is done either by a fuel regulator controlled by the engine vacuum, or a mechanically calibrated regulator located in the fuel filter or the fuel pump module. Since electronic fuel injection systems became popular in the 1980s, there have always been mechanisms that regulate fuel pressure. Thanks to this modulation, the computer can increase or decrease the amount of fuel delivered by changing the fuel pump rotation speed as needed. For years electric pumps have been directly controlled by the vehicleвЂ™s computer which вЂњmodulateвЂќ the flow of fuel to the engine.

There was a time when fuel pumps supplied a constant flow of fuel at a given pressure.

Electronically-controlled Pulse Width Modulation (PWM).

In that sense, the capacity of the fuel pump must be adequate to satisfy the demand of the engine. Moreover, beyond вЂњhaving pressureвЂќ the system needs the вЂњappropriate pressureвЂќ to perform as intended. The reason is very simple if the fuel pump fails no fuel arrives at injectors, thus all other factors became irrelevant. As you might expect, the fuel pump is the main factor that determines the amount of fuel that reaches the combustion chamber. LetвЂ™s start by taking a quick look at the factors that determine how much fuel pressure reaches the injectors at any given time. In this video, we are going to explore how fuel pressure affects vehicle performance and fuel economy, both for traditional port injectionВ and most recent DI systems. However, newer vehicles using direct injection (DI) systems, also known as gasoline direct injection (GDI) systems, have raised the importance of proper fuel pressure to a new level. It does not store any personal data.Importance of fuel pressure in traditional EFI and modern DI systemsДЇuel pressure has always been a key aspect of the fuel delivery system. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category 'Performance'. This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category 'Necessary'. The cookie is used to store the user consent for the cookies in the category 'Other.

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Mikuni fuel pump troubleshooting