USE FAQ's THAT's WHAT THEY ARE THERE FOR If you can't find it there, then post. j/k
But seriously, check out the FAQ sometime, it's really helpful.
Here is your answer.
If you don't see a loose tube on that thing, check to make sure the tubes aren't split anywhere. If the tube isn't loose and the tubes aren't split, then you have a leak off one of the intake manifold tubes. Good luck finding the leak on one of those. If that's your problem, you might as well take the car to a mechanic.
-Enjoy
