Got a check engine light and a rough running motor after leaving the Expo. Limped into a Payson and had a scan completed at Auto Zone. Code was for a cylinder 5 misfire. They had a coil pack in stock so I decided to replace. Had a bugger of a time removing and when I did it was covered in carbon. The spark plug wouldn't come out and it wouldn't tighten either. The rig was loaded on a flat bed and taken to the dealer. Anyone else seen this in a 100?
Blown spark plug
- Thread starter f5driver
- Start date
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Yes it happen to me... you will have to helicoil the head. I had a shop do mine on the truck in new mexico. Call around for a machine shop that has done it on fords....very common on some of the f 150 motors. PM me and I can call you.
Have had no issue with mine since. The problem is the FI keeps pumping fuel in cylinder so when you put new Chinese coil is caused a fire in cylinder....or that is what mine did. That is why now I carry an extra coil and have a code reader so when happens again I replace with oe coil and pull plug and let some fuel evaporate in cylinder before restart
