Code: Cylinder Misfires at random

Thank you for your response and advise, the truck is a 1997...thank you for pointing that out. I will have my son check for vacuum leaks.

your welcome.maybe you can change the header of your question,because it says 2007.i have the same engine,but mine is a 2000 f-150 4.6L supercab,304000 miles.check that pcv valve hose,mine was mashed flat.it thru 9 codes,1 3 inch piece of hose fixed all that.