i have an 05 FX4 and started to have the same problems as you right about 41k. its been nothing but a headache with this truck, one thing after another. it jumped timing on a misfire that blew my exhaust apart, from there the time jump took out my cam phasers, cam sensors, the timing chain broke as well when this all happened so i had to replace both of them along with the tensioners. had all this done and truck ran great for about 2k more miles then started misfiring again. come to find out its a plug issue, pull all the plugs and of course 5 or the 8 broke off in the head but the number 5 cyclinder was interesting. the only thing left of the plug was the ceramic. all the metal was burnt and or melted! replaced all plugs ans coil packs at this time and ran great for about another 1k or so then had to replace coil pack #8, and number 2 twice. i have had no luck with this truck things just seem to be getting worse because the other day i went to put it into 4wheel and it locked in fine, when i was head down the trail to our cabin herd a really loud thump and then a bang get out and look and to my amazement the transfercase was in peice underneath my truck! ive about hit my boiling point with this truck. ive owned it since it was brand new and have always had it dealer serviced, but now with a little over 10k outta ive spent upwards of $11k to fix this truck and keep it as my daily runnner. paid $36k for it new, and with over $11k in just repairs, i appauled at fords craftmenship on these trucks! the money i spent on this i should be driving around a F350 Lariat or King Ranch. ive been a ford guy all my life but this is just rediculous
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