I'll give my 2 cents on the 5.4 3v engine. It's a POS. The design was screwed up compared to the 5.4 2v that was a lot better engine. The spark plugs, fuel injectors, vvt system, etc on the 5.4 3v is just plain sorry. VCT on any truck engine is worthless. No need to adjust the cam position to squeak out a little better mileage or performance at the expense of problems. The cam phasers and solenoids should be called maintenance items b/c after about 75k they gum up or wear out causing the engine to run like crap and costs a ton to fix. I'll never buy another truck engine with VCT or VVT in it. Ford as well as all the other manufacturers are complicating these engines to their ruin. Sorry to have that opinion but true.