car wont start!!

[eastcoastS14]

ok before i start this let me just say that the search button isnt working for me right now...that being said i need help here. (this is for an SR) Last weekend i finished putting my battery in the trunk brought the optima im using to autozone and got it charged. it was cold this week and my car got snowed in and when i got home it wouldnt start. I realized the clamps werent tightened all the way on the terminals so my battery was dead again..got a jump but when i turn the key it cranks and cranks but wont start. I can hear the fuel pump working and it cranks at a normal speed like its about to start but it wont. What would cause this? fuel pump is a walbro and it came with the car but i think its relatively new so i dont think its that...plugs maybe? Very confusing because i just took it for a drive last weekend and everything was fine..... any help would be greatly appreciated