engine runs like crap!!

[cruisen_15]

ok, heres whats going on with my engine, when i drive my svx there is a hesitation but it repeadly hesitates a number of times under acceleration, give it more gas and it goes away, let off the gas and and it will do it again, lets say i turn it off, and drive it again for an hour, it will finaly stop, or the next day, it will be completly gone! its like everyother day... its hard to explain but man it sounds like its miss firing or sumthin, it just rides and sounds terrible when it is under acceleration... anyone got any ideas?