Systems and methods for a vehicle engine fuel system

A method for generating a component recommendation to a vehicle operator, comprising:

• measuring an operating parameter to differentiate degradation between a first component and a second component, the operating parameter affecting the first component for a vehicle and the second component for the vehicle;
• diagnosing differentiated degradation for the measured operating parameter between the first component and the second component based on cloud enabled machine learning;
• and
• recommending replacement, including a brand, of the first component or the second component to the vehicle operator based on an output of the cloud enabled machine learning,
• wherein the operating parameter is at least one of a fuel refiling habit and a driving style.

A vehicle system, comprising:

• a vehicle engine fuel system including a low-pressure fuel pump, a high-pressure fuel pump, and a fuel filter;
• and
• a control system with instructions therein configured for, when executed, indicating degradation of each of the low-pressure fuel pump and the fuel filter based on a comparison between a pressure differential and a demanded fuel flow to an engine, the indication distinguishing between low-pressure fuel pump degradation and filter degradation, the pressure differential being a difference between a pressure setting at an inlet of a high-pressure pump and an actual pressure of the high-pressure pump,
• wherein the demanded fuel flow to the engine is a flow of fuel estimated to maintain the pressure setting at the inlet of the high-pressure pump,
• wherein the actual pressure is measured by a high-pressure pump pressure and temperature sensor coupled to the high-pressure pump.