Good morning,
Do you have the 5.4 3 valve? Breaking spark plugs is common, in fact most of them break when removing.
We do not offer repairs, only advice. You would need a local shop for this.
I attached the link to the tool for removal. This is what I used when I was still in the field. It works great for removing the plugs when they break.
https://www.amazon.com/Cal-Van-Tools-39100-Triton-Extractor/dp/B0038R8CYI/ref=sr_1_3?dchild=1&keywords=5.4+ford+spark+plug+removal+tool&qid=1596391133&sr=8-3
If you were to go to a dealer, they will charge you around $900.00 for the replacement.
Look for a local shop that will do it cheaper. They take about 6 hours for removing all 8.
Roy
Sunday, August 2nd, 2020 AT 11:02 AM