help with starting my car.

[aisnow320]

ok so i jsut bought a 1990 240sx the car runs great... on warm days but for sum reason everytime it gets cold i refuses to start i just replaced the plugs and wires i have no idea what would cause it to not start only on cold days. if anyone knows please help i need to fix this thing asap

[DSMTJ]

is it cranking and not firing up at all, attempting to fire up, not even cranking, give us a little more info.

[blkZ06]

fuel filter

[aisnow320]

yea it cranks and cranks but no fire. i just dont undertand why it wont start when its cold out, why would the fuel filrter stop it from starting only when its cold???