My dads Catera a V6 3 Liter just wont start. Here is a link to a vid that will probably explain things better on what is going on.

http://s16.photobucket.com/albums/b43/camaro96/?action=view&current=CIMG0740.flv

Please feel free to ask any question and leave any feedback thanks.

It could be a lot of things causing a no-start. Bad/weak fuel pump, plugged fuel filter, leaky injector causing a flooded situation (try starting with the peddle to the floor and see if the engine starts; this should clear a flooded engine).