My engine was running a little rough. It wasn’t throwing any misfire codes, but when I replaced the spark plug wires, it ran so much better. A month later, now it is back to running rough.

I have the SRT6, so I have two plugs per cylinder

Will the car throw a code if one of the two plugs isn’t sparking? That’s why I figure it’s rough, but not throwing a misfire code. Is this right?