2002 GC acceleration problems

my 02 GC has just over 50K on it. just recently, it has started to hesitate on acceleration. last night, the wife told me that twice on the way home, from a complete stop, the van would not move until it was over 3000rpm. I've basically ruled out anything related to fuel, unless i may be wrong.

that was the first time it happened from a start. the other day i was driving it, and around 30mph, it would hesitate, then take off...

any clues or things i should look for?