My versa won't start

I have been googling and working on my 09 versa sl all morning and I'm getting a bit desperate! It will crank but not start up, just kinda make that whirring sound as it struggles. I tested the battery, 12.6 v jumps to 14 when it cranks. I turned on the peer while my wife listened in the gas opening and she heard the sound of the fuel pump. I've checked the fuses. Where should I go from here?