ok i have a 97' Z24 and i am haveing a huge problem figuring out what is wrokg with this thing i have replaced the crank sensor, coil packs, plugs, icm, cam sensor, and the fuel pump and it is still missfireing on cyl 2 and 3 if you know how to fix this please help me i realy dont want to take it to the dealer and get riped off my e-mail is hostileteam@yahoo.com or you can call me at (907)351-3028 thanks.

I am having same problem with a 1997 z24 Cavalier 2.4 OHC ! Getting Code P 303 misfire on Cylinder 3 . I changed coils around put new ignition module in same code comes up. How hard was it to change cam sensor ? I figures thats all thats left to change I hope! Sounds like you changed everything it could be ??????????