Porcelin cracked on #3 plug.. this WILL cause a misfire. Not sure how or why. But it does.
I was practically unable to even get my 5/8 socket on it from the top, so I searched online for a way to change the plugs on an 01 Ranger, and found a link, complete with pictures and details. Had I not found this, it would have taken much longer. I did not know taking the pass. wheel off and the wheel cover makes it much easier.
Here's the link
http://www.fordrangerforum.com/engin...ugs-4-0-a.html
Hopefully this will help new Ranger owners on their tune-up