Originally Posted by 93RedSled-SSE
If you want more assurance, you can pull the wires off the coils one at a time, with motor running and IAC unplugged. The miss will either get worse or stay the same. Of course, when the miss does NOT get worse with a wire off, that is one of your bad plugs, wires or coils. I'm a chicken, so I like to use rubber handled pliers and rubber gloves. It will still give you a little tickle when the wire is put back on.
Call me "Sparky."
Did you do this test? You can either KNOW it is the ignition or eliminate it as a possibility and go on to something else.
So, if every time you pull a wire, it gets worse, and it does it on every wire, then it would eliminate the ignition as the culprit (at idle anyway).
IMPORTANT: Procedure says to not run it for more than 2 min. w/IAC unplugged.