P303 Misfires

[97sunfiredad]

I have a '97 sunfire 2.4L DOHC consistantly misfiring on cylinders 1 &3 and gives a P303 code error. I replaced the coil pack and it did not make any difference. Please send any/all repair ideas.
thanks !!

 

[Zimgxp]

Spark plug, wire, fuel injector, low compression, coil bracket (dist cap).