ProV, have it checked for codes.
Could be anything, air mass, clogged fuel filter, clogged engine air filters.
You know you can get a generic code tester at most auto part stores that you can check codes yourself and then come here and tell us what you found.
Some of theese smart guys on here will steer you straight.
Some may give you some crazy suggestion about what they did to fix their Grandma's 66 Pontiac Catalina and how it may relate to your problem, but you may get one out of ten suggestions right.