first cylinder wont fire!! need help asap!

my ca wont fire on the first cylinder. ive swapped the injectors around and the coil packs and mixed them all around. ive heard its comon for a ca not to fire on the first cylinder. its got a brand new head gasket. and i cleaned tthe crap out of the intake mani, and the butterflys and i cleaned the valves and valve seats with grinding compund. anybody ever have this or heard of this??when i get home im gunan give the coil pakcs an ohms test. and see if its a short in the coil wiring mabey? and im gunan check to see if the fule rais plugged with seddiment ro something.

please no flaming. i just want some guidlines and help to the solution.