check the timing marks on the cams and crank. I had the same issue and my timing belt skiped so many teeth that i vent bout 4 valves, one had half ot it missing and another was gone...
mine also bucked like crazy and drove it home but it too sounded like a diesel and it died at my driveway...
check that and go from there..

sorry bout them fugger stealing your stuff but what are u going to do...damn it damn it