#3 cyl misfire

i have a 2000 malibu with the 3.1 and have a code 303. i've replaced the ignition control module,plugs,wires, and coil pack.i've swapped the injector with one from a differant cyl and the problem did not move,still a 303.using a noid light i checked power going to the injector and am getting power,at least while cranking.the car starts right up but runs rough and no power.have good fuel pressure,about 50 psi.something i found odd is i have a stronger spark on the #3 spark plug.any help/ideas would be appreciated.

You have mechanical valvetrain issues or the PCM driver that grounds #3

hey did you ever figure this out? I m running into the same problem right now with my cousins car

hey hey hey... what are you doing here??? :screwy:

haha...you got me.. I was fixing my cousins 00' Malibu...haha so for anyone thats reading the thread...problem was due to the ground pads on ignition coil all rusted up...bad. replaced the pack and she was good to go!