X2 on the Coil on Plug. Been there . Check #4 and 5 first.
If missing on a load then check them. They don't throw a code, other than a miss. Can be check with a timing light.
Pull coil , insert a spark plug wire between plug and coil , run engine and watch timing light. My is a 99 and had #5 first fell, then #4 then #6 all within a a two weeks. Order a new complete set and change them all out and keep the 3 new ones as spare. No issue last seven years.
Two dealers spend 4 plus hours each and never did get it to mess up. The second one show me the how to test it again when it mess up with the timing light and sure enough it mess up a few days later.