1993 Chevy Astro

I have a 1993 chevy astro van. My van is wanting to stall when ever I start to accelerate and while i'm turning. The only way I could make not stall or close to it is to coast as much as i can.I just got the oil changed, air filter, fuel filter, and the oil filter and I still don't know whats wrong with it. when ever i put it in park and push on the gas a little bit it's really ruff and choppy and almost dieing.