Spark plugs

I have a 2000 Grand AM GT 3.4 and i changed the spark plugs in it and the ignition coils but when i changed the coils i still had the old sprak plugs in it and it started. Than the next day i changed the plugs and the wires but before i did that it started, and after i changed them i went to start it and it didnt start.. I might have the wired screwed up on it im not to sure.. if you could tell me the firing order and what spark plug wires got too...

What does it do while its trying to start. Does it backfire or half start and stall?

go to www.autozone.com, surf their site for plug wiring diagram. sounds like switched wires.

hope this helps