first off , when you turn key on , does security light come on the shuts off , or does it come on and starts flashing, if it is flashing , you might wait about 10 minutes and try again , if it still flashes the your passlock module is bad and it will not start and stay running, i have read alot of people have bypassed them , but i just replaced mine . hard to get to inside dash.
if your security light doesnt flash , first thing i would check is fuel pressure if you have anything less than 55 lbs you have a bad fuel pump, this is an item you dont want to go aftermarket on , as there are alot of bad ones out there, oem is the way to go and they are same price 200.00 , no matter where you get it.
i hope this helps