Spark plug Autolite or BRISK

Seems like you did everything except swap out a $2 spark plug. I had a misfire on cylinder #1 first then cylinders #3 and #4 until I went out and bought 4 new Autolite 3923 spark plugs and put them in and BINGO no more problems the car is running strong and not throwing any codes.

We both run Autolite Platinum and they fired up no matter how cold it is on the first try.

I tried the 3923's and my car ran like arse - rough idle etc.