If your noise sounds like a loud engine type knocking noise then scan for misfire codes. The cylinder misfiring most likely blew out the spark plug along with the threads.
There is a tool to repair the threads but may cost you around $400.00 to $500.00 plus parts and your time?
But I am just guessing at this point but fairly common with Ford. If you can provide more information like CARADIODOC has stated earlier or post an audio sound then maybe we can try to confirm if that is your actual problem.
Thursday, February 16th, 2017 AT 9:09 PM