CEL came on for above code. Code states a miss in “D” ignition circuit. I am assuming that “D” is for number 4 cylinder. Correct? Plugs where replaced 6 months ago when I added a Edelbrock SC. I took the car out yesterday after it has sat for about a month without running. Snowing today so it will be a while before it goes back out. I think I will just wiggle the coil and see what happens when it goes back out.