Here's why:
* The fuel pump relay's role: The fuel pump relay acts as a switch, controlled by the car's computer, that allows electricity to flow to the fuel pump.
* Fuel pump function: The fuel pump is essential for delivering fuel from the tank to the engine.
* Without the relay: If the fuel pump relay is out, the fuel pump won't receive power, and therefore cannot deliver fuel to the engine.
However, there are some exceptions:
* Older cars: Some older cars might have a simpler fuel system where the fuel pump is always powered, bypassing the need for a relay.
* Manual fuel pumps: Very old cars with manual fuel pumps (where you need to pump fuel manually) don't rely on an electric fuel pump or relay.
* Carburetor engines: While less common nowadays, carburetor engines don't have a fuel pump in the same way, but rely on gravity or vacuum to feed fuel to the engine.
In most modern cars, a faulty fuel pump relay will prevent the car from starting. If you suspect a fuel pump relay issue, it's best to have it inspected by a qualified mechanic.
