my poor car

please can i get any information outside there? my car is 1995 model nissan altima and about 2months ago when it is running, it would run for like 4hrs then suddenly stop and all effort to get it to run alway prove abortive. If i leave it overnight or for about 8hrs then is does the samething again. I have had to change the ignition distributor, test a different fuel pump and ignition coil but it still remain the same. any hope for me?

wrong forum