help!

[nate_drake]

ok so i went to go turn on my s13 sr toaday and it wouldnt start. so i had a look to see if i was getting spark. and as it turns out i am getting spark on cyl 2,3,4 but not number one. i tried switching the coil packs around and the pack that didnt work on number 1 works on number 2. i had a look at the plug that connects the coil pack harness to the rest of the car and i am getting 12 volts to that plug..
not sure where to go from here, any help is appreaciated!
thanks
nate