Fuel can come in many forms, food fuel, engine fuel such as gasoline, fuel for heat, like coal or oil. Because fuel isn't easy recognizable as useful without something to transfer it into energy, it is sometimes difficult to tell.
When fuel is not coming out.
Is it an electronic or mechanical
When it's not pumping fuel.
Do a fuel pressure check-no fuel pressure means defective fuel pump-
at first we have to know what is specific fuel consumption. From definition we know that- "The amount of fuel required per unit production".
The fuel pump relay is to move the fuel from the primary tank to the engine itself. To accurately answer your question I would have to know the exact fuel pump you want to know about
A fuel pump pressure test could determine the condition of the fuel pump and fuel system.
When it fails to pump fuel as it should.
Change the fuel filter first. If that doesn't help, change the fuel pump.
It send the signal to your fuel gauge to let you know the amount of fuel you have in your tank
how do you know if your fuel pump not working 1983 ford 250 an how do you change it
No the reserve fuel is to just let you know you are in need of fuel and to give you time to get it with out running out of fuel.