|
There's a third part of the equation and that is the fuel pump check valve. This is a one way valve that prevents fuel pressure from leaking down after the car is shut off.
By keeping the pressure up, even when the car is off, it enables the car to start on the first few cranks - otherwise the system would have to build up pressure before having enough fuel pressure to squeeze fuel thru the injectors - taking 10 or 20 cranks before the engine will start.
|