Prince_of_Tokyo_RA

hey people, got a v-ltd sti ra, but its giving alot of starting probs. once started drives perfect. but after a 10-20min drive the engine stalls. basically, engine turns, but doesnt fire up. leave it for about half an hour, it fires up but once moving the revs just drop and it stalls after around a minute to five mins. then same problem again . any help would be much appreciated...cheers