Quote Originally Posted by Giovanni89 View Post
Timing belt/chain broken? No compression on all four makes me think the valves aren't moving
This, along with Mr. Geezer's observation, are what I think the problem is. When my 2.4 stripped teeth on the timing belt, it did make a strange sound while cranking, although the engine turned. It wasn't until I started opening things up that I located the real problem. (And from there, my adventure began).

It's easy enough to check: take the top timing cover off and crank the engine. If the timing belt isn't moving, then it needs to be replaced.

A sudden loss of compression indicates the valves are in an open position, though Tortron may be correct. Again, you won't know until you look deeper.