still runs a little rough

[Austin-591500]

hey all,
so a couple of days ago i did my first plug change since i did the plenum fix. as suspected one of them was tar black covered in oil, and the rest were just meh. i havent changed wires yet, but the distributor cap and rotor are all new. i didnt put cheapo plugs in either, but at low RPM it will sometimes shudder, REALLY bad, and sounds like its missing on one cylinder. ive narrowed it down to one of our problems, either plug wires, ignition pack, the o2 sensors maybe(havent been replaced since plenum job and i also have a straight pipe, or crank position sensor. anyone here have a clue?

 

[Joe w.]

First thing I would do is take out the plug that was covered in oil again just to make sure it's not covered again. Then check wires.

 

[Austin-591500]

UPDATE: changed plug wires and that seemed to be the solution, but ill update again over the weekend