what is the job, work of fuel pressure regulator in a automobile?

Question

does it regulate the flow of gas so it wont stall or hesitate when you step on the gas pedal? how does it work?

Answer 1

to maintain pressuer so that you dont blow seals [e-mail] jj kustoms

Answer 2

wow reading the answers u got, these people are bright ok lets start from the beginning in new fuel injected cars fuel is forced into the intake rail just in front of the cylinder, u have an electric fuel pump with a fuel return system so fuel is constantly flowing in a loop through the vehicle and the reason it flows is to keep the fuel pump from dead heading meaning pumping fuel into the line with no where to go. principle of hydraulics, u cant compress a fluid so if ur car didnt have a return line it would blow the fuel rail appart. and the injectors require a certain pressure to force an exact amount of fuel through them that is monitored by the ecm through several sensors like 02, coolant temp, rpm, throttle position, duty cycle, pulse width ect. the job of the regulator is to maintain that pressure and raise that pressure if needed by fuel demands of the engine. (rpm goes up pressure should rise slightly, rpm low fuel pressure should be with in a certain tolerance) the regulator on most cars is basically a housing with a rubber diaphram and a spring inside and a port for either a vacuum line or some ecm controlled sensor like new fords anyways when the pressure gets to be a certain amount against the spring and diaphram the regulator opens to let some pressure through until it drops to spec again. this process is constantly continuing as the car runs. now there are other types like boost sensative regulators for turbo or supercharged cars. when u pressurize a manifold u have to over come that excessive pressure on top of injector requirements so if stock psi is 32lbs and ur running a 16lbs supercharger u have to increase fuel pressure as boost climbs during various rpm at wide open throttle at max boost ur pressure would read 48 but a one third throttle at 9psi boost the fuel pressure would be 41 u have to compensate. hope this helps and is clear

Answer 3

a pressure regulator assures the fuel is getting to the ijnjectors at a specific rate and pressure. if the pressure regulator fails, fuel from the pump cannot be regulated for proper funtioning of thye vehicle and you'll most likely have to much gas getting into the engine, thereby using to much gas. when you press the gas pedal the amonut of gas to the regulator increases because the flow regulator opens to allow more gas to be sent to the engine. if the flow is not increased the pressure of the gas going to the engine lowers and the engine will be slow to accelerate and may even stall.