It sounds like it's not running on all four cylinders, or else the timing is off so far that it barely runs. I'd check each cylinder by pulling plug wires one cylinder at a time to see if it drops off any worse (or just dies). Who knows, maybe you got lucky enough that a couple of plug wires got switched.

But the wobbly crank pulley makes me thing that it is indeed a cam timing problem, possibly something has come loose or cracked down there. The timing belt pulley is a cogged pulley behing the crank pulley. You'll want to line everything up and check all your timing marks, maybe even pull the crank pulley off and spin the engine over while looking at the snout of the crank to make sure it's not bent.