friends grand prix w/3.8

hopefully u can help us out cuz i still dont know all that much bout engines, my friend has a grand prix with the 3.8 and he no longer has to hit the gas lol it goes by itself and he cant set the cruise or nething without it accelerating, im guessing that its the throttle stuck but is there anything else that can cause it that anyone knows of?

might have a big vacuum leak, if its been like this for very long i would think the check engine light would be on

yah i was checkin it out bout an hour ago and the check engine light is on and its a slower process but its steady, he says hes takin it in 2moro and ill suggest that 2 him

Could also be a sticky throttle cable.