My s2 started up this morning but then died

It was on the red but put more petrol in it but she still wont fire.

The plugs are wet and there is a spark there but no sign of life so far. The only wierd this is that when you put the ignition on and when the pump primes there is a wierd noise like when you let air out of a balloon slowly coming from behind the inlet manifold

When you remove the fuel pump fuse this noise dissapears so it related the the fuel system.

Any help would be great.

CheeRS Guys