hello all

i have a problem with my s2 rst. i was driving it yesterday, car was ruuning ok

all of a sudden it started to back fire and the engine died, tried starting it again, it would turn over fine but just wouldnt start, left it for a while, it started fine, driving it again today, it started to jerk and the engine died again. it did start up again and know runs ok, i have been advised that it might be the fuel pump, i have checked the purple relay which seems to be ok. is there a way of testing the fuel pump. i know your supposed to hear it prime when you turn the ignition on, but ive never heard it before.
anything else i can check

pls help as getting quite pissed of with not being able to use it, especially when the weathers as nice as this