1994 chevy astro work minivan. just started to have trouble starting?

the other day i started it up and it ran good . went about 45 miles with one stop still ran good.i parked it for just a minute and tried to start it to move it closer to where i had to unload somethings and it turned over quite a few times hard and it finally started . i had to run it at high idle for it to move. i left there to come back with one stop to get 2 cans of dry gas and put that in tank. van still hard to start and run slow. once i got it moving faster the van seemen to run fair to good. got it home and parked it . the next day i tried to start it and put in the back yard to take a look at it. well again the van was very hard to start all of these times when it did start i had the gas peddle down all the way for it to start. it started very hard the same way i drove it about 40 ft and it just stalled. not able to start it . the next day went out to try to start it and the same thing very hard to start. but it did once and i reved it up but as soon as i let it idle it stalled