diagnose the noise

Which noise? The sound of the worn out four banger, or the noise of one of the engine driven accessories heading south? :p
 
More issues! whoo-hoo! Whenever I'm on the throttle (cruising) the power will cut out and the revs will drop. As soon as I prod the throttle, it goes back to normal... until I let off again. This happens only when the car is cold. The knocking noise also goes away when the engine is warm. This leads me to believe that its a small hole somewhere that's causing all of this and it simply closes when the hot metal expands. Thoughts?
 
It is eating itself.
 
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