There is a vacuum hose diagram on the underside of the hood.

 

now its a knock comming from what i believe the bottome end, i took the car to my dads friend shop, he said to not drive the car until i can get it to a dealer or do the work at his shop, he said its serious. off to the dealer i go! i hope its nothin serious, i just got the car 5k miles ago from carmax