Hey guys. I've been away for a good bit and have forgotten all of the problems I had with my 1997. Because of this, I'm considering an 2005 Expy, 5.4. I'm reading about cam timers as problems and also fuel injectors that leak and hydrolock the engine. Ford says they have updated injectors on their shelves. If I buy a truck I may just replace all injectors as safety precaution. Do aftermarket injectors have updated design and is it just the factory injectors that were the problem?