I replaced the COP but not the plug. Still misses some. I think I was probably supposed to replace the plug. Will the plug ever clear?

 

Sparks plugs are a consumable item. A new spark plug costs around $3. No brainer really.

 

Yeah since you're already in there anyway spring big time for a new plug---can't hurt!

 

20/20 hindsight. I paid my handyman to do it, and didn't give him any instructions to do the plug. So the COP is new, but the plug was not changed, although I doubt it has 25,000 miles on it.

I'm asking if the plug will clear over time.

 

Most like it will not clear itself now or in the future either.