Rough idle/ misfire

[SoithernStrokin735]

My 02 is idleing rough and has a minor surging problem under 2000 RPM. Pulled codes and I forgot the codes but they were cylinder 2 misfire and catalytic ecfeciency under threshold. Replaced o2 sensors trying to help the second code but it did nothing. I know I need to check plug wire routing because the guy I bought it from just put a new coil and wires on it. I just cant find a diagram clear enough for me to understand. I need a actual picture lol. If the wires are ran correctly do yall think it may be cyl 2 injector? Need some input. Thanks!

 

[dirk_dirk]

pull your spark plugs and see how they look...

 

[SoithernStrokin735]

Finally some help lol. I actually did that yesterday before I saw your message. Plug on #2 is kind of a brownish copper color and all the other plugs look normal to me. Also the electrode seems to be slightly more worn or burnt down looking unlike the others. Coil pack and plugs and wires are all new. I pulled the feul rail and all 3 injectors on that side and #2 looked more dirty than the others. Not in the center where the feul actually comes out. Just around that little cup. Tried cleaning all of them with carb cleaner. Put them bback in and it made no difference. According to what i read the injectors ohm out between 11-18 ohms. All mine were around 14.5-15. Possible that the injector is still good but has a piece of trash in it? Also today it started skipping really bad but only sometimes. I hope i havent burned a valve or a piston. Any help would be greatly appreciated because i cant afford to take this thing anywhere lol.

 

[dirk_dirk]

with the plug out did u see if it had good spark? cause it sounds to me like the plug might be fouled. could be to bad spark or leaky injector.