Misfire Cylinder 2 & 3 only getting code 300
 

So the car has a almost non noticeable misfire, only at idle and when taking off light load, she just started this after I went on a fishing trip about 2 hour drive each way. I swapped plugs coils and even injectors but the misfire do sent follow it just stays at 2 n 3. Anyone have similar issues? By the way car is bolt on to the max also running a tvs. Starting to think computer went but I also read on here something about a sensor or connectors but the ac line etc. This problem is driving me nuts as I'm due for inspection soon..
Thank for the help in advance

first you need to learn which section to post in you need to post my junk is broke in this section right here Problems/Service/Maintenance - Cobalt SS Network

second its more then likely tune related