I have a 2005 Dodge neon sxt. Have a po304 code. started to change plugs and wires when I got to the 4th it had oil inside the sparkplug tube. It was lose and oil got in because of that. The valve cover gasket looks like new and no sign of oil outside of the valve cover.
I sealed up the tube, it has not leaked yet after 25 miles. It is running better but still had a miss. Could it be the coil? It was oil that caused the miss in the first place now that is fixed why is it still missing even if it misses less?