A carbureted vehicle will typically need fuel pressure set between 6-10 psi, while EFI cars will need between 38 and 50 psi (3-4 bar), depending ... Is Your Fuel Pump Wired Through a Relay ...

Now, the fuel pump is not running for 1~2 seconds ... I cannot identify from my Haynes manual the relay for the pump in order to check that. Which one is it please - it's for a 2000-on Ford Fiesta ...