2003 Ford Expedition 5.4 ltr Triton is having a misfire but do not get codes mechanic says. He does get a P1780 Transmission Control Switch but does not believe this will cause the misfire. Any help would be greatly appreciated.
Let me first say... I did a lot of reading and researching. Since advice given here and on many other posts, problem was a COP. Ordered eight new plugs on ebay from global-automotive at a total cost of $65. Had mechanic put in for $60 and everything is running smooth (also bought small tube of dielecrtic grease). Problem fixed. I have put on about 400 miles and still no problems.
Thanks to everyone who gave advice on this post and other posts as well!!