well the other day it snowed really bad and since then my car wont start. it just cranks over and sputters realy bad but thats it. i changed the plugs about 2 weeks ago. i pulled them all today and the smelled of gas so im getting fuel, i replaced the coil packs, put gas in it, checked all vacume and electrical connections. it ran fine the night before. i started it the next morning and it idled really rough and as soon as i put it in drive it just died and it has not started since. the plgs were really black when i pulled them but it probally trying to start it so much. what else should i check!