So I got the P0306 code about a month ago, and went ahead and changed spark plugs, plug wires, and coil pack. Im not that worried about it because if it wasn't for the code I wouldn't be able to tell it was there. Idle's a little rough at times, but performance wise its perfectly fine. Anyways after I changed the plugs, plug wires and coil pack, it still didn't go away and it still starts and drives just fine. Im wanting to fix it anyways because its my daily. Im wondering if anyone has had the same problem, and what they did to fix it.

 

Could be a dirty injector, try running some injector cleaner in the gas tank.

 

What causes a misfire without really affecting the performance? Because everything I've seen on other forums about people having the same problem as me but they describe it like its more severe.
I dont think its injectors, compression, or vacuum leak.

 

If its a fuel injector problem I feel it would be performing worse than it is.