[Daox]

So, I got an 05 Aveo recently with a busted timing belt. I replaced the engine with one from an 07 Aveo (slight differences). Its in and running, but I keep getting a P0300 code which is "Random/Multiple Cylinder Misfire Detected". So, last night I replaced (meaning swapped parts from the 04 engine):

spark plugs (replaced & regapped)
wires
ignition coil

Its a waste spark ignition system, so thats about it for parts AFAIK unless there is a separate ignitor. The misfires aren't noticeable, but the code keeps coming back.