I have a 1998 dodge intrepid 3.2 v6 that is throwing codes p0205 and p0305. I have had it to a local mechanic and he changed the plugs, wires, and coils. I know the codes mean there's a misfire on the 5th cylinder. I have ran fuel injector cleaner through it a few times, and over the past year or so, this has made the problem go away. Unfortunately, this time no such luck. Should I just change the injector or could there be a different problem? Do I need to change all 6 cylinders or would it be ok just to change the 5th? Any ideas would be greatly appreciated. Thanks in advance!!