Conversation so far:
where is the fuel pump located in a car
In modern cars the fuel pump is located inside the fuel tank.
what does a fuel pump do
The fuel pump creates positive pressure in the fuel lines, pushing the gasoline to the engine.
is a fuel pump necessary
A fuel pump is a frequently (but not always) essential component on a car or other internal combustion engined device.
which vehicles do not have the fuel pump
Many engines such as older motorcycles do not require any fuel pump at all.

Question: can you tell me how the pumps evolved over time
Self-contained rewrite: how have fuel pumps evolved over time