A fuel system malfunction that prevents the uniform flow of the fuel can cause fuel pump pressure surging at times. A failing fuel pressure regulator is one of the most likely causes for this surging. Pressure: The regulator is made to keep the pressure of fuel I a specific range at typically 40psi to 60 psi or depending on the vehicle. A faulty regulator has been known to cause pressure not to maintain constant, which in turn leads to surging. Pressure surges from the boost can lead to odd engine behavior, like hitting a plateau in your power curve under acceleration or even spikes where horsepower randomly explodes off the top of what had seemed an already slammed throttle. If in fact the fuel pressure deviates by as tiny a margin at say 5 psi, it can greatly lessen how smoothly your engine will run.
A clogged fuel filter is another common cause of pressure surging The filter gets clogged with debris and contaminants that restrict the flow of fuel. As the fuel pump adjusts to this mass, it might over-pressurize and operation surge. To avoid these problems, mechanics usually recommend that you change the fuel filter at 30,000 miles: a blocked filter can decrease the fuel efficiency up to 10-15%.
Surge can also be caused by electrical problems related to the fuel pump relay or fuel pump wiring. If the pressure varies while this is happening, then it can be an indication that the fuel pump not receiving a constant voltage due to a faulty relay and worse case scenario if left panicked about hitting walls could end up killing ourselves. This spark issue will also increase the load on the pump by 20% loss, thus making it more probable to have fuel delivery issues and pressure surges.
Additionally, a failing fuel pump can in some cases actually contribute to pressure surges. An old pump can intermittently reduce fuel pressure, with the ebb and flow of pressuring escaping through a gap. This is particularly true for pumps that have accumulated over 100,000 to 150,000 miles. If the internal wearing down: when the internal components are all worn out such as an impeller or a motor, then in this case, the pump will barely be able to deliver fuel consistently, and it will cause surges.
A 2019 Ford recall over fuel pump issues is one higher-profile example of what can happen when pressure surges are left unchecked. Although the pumps gave pressure, they also resulted in stalling and erratic engine behavior due to fluctuating pressures that then went on to show the necessity of constant fuel maintainable pressures.
That has been the illo for years on the Squadra Course ingestled behind us After all, as Enzo Ferrari once said, “The engine is the heart of a car, butthe fuel is the blood that keeps it alive. This quote reminds us of the importance of such fuel system parts as a fuel pump in general vehicle performance. If fuel pressure starts to spike up due to problems now the cars "blood" won't flow as well and you are looking at imminent engine failure unless you address what is causing the root problem in that situation.
For more information about how to diagnose your fuel system issues, please visit our Fuel Pump blog.