Stop in for a cup of coffee

Set all 4 plugs against a steel bar and ground it. Then have someone crank engine to see if its firing on all 4. I suspect it is.
I did the pull a wire thing. Was definitely firing all of them, but was surprised it actually ran pretty smooth on any 3. Like it took a second for the computer to think about it and it said FU we are running on 3. LOL