Re: Is there some thing wrong with my 2005 FX4?
It is for mine. 0-60 in anywhere from 8-10 sec is great for my 4.0l. I get about 17-18 mpg's almost all highway. You could start to drop some serious money on this truck by going above and beyond a tune up, I.E. intake, exhaust, coil pack, synthetic fluids...etc. IMHO, if your getting a consistent MPG, not burning oil, not loosing coolant, not hearing weird noises, idles smooth, and no warning lights. I believe you truck is fine, the cool, newness of it might be wearing off. Welcome to FRF though. Search around the site to see what we have done to increase HP, if that is what you want.
(SOLD) 2003 Ranger 4.0L V6 FX4
2001 F150 Supercrew Triton V8 (DD)
2008 Fusion 3.0L SEL V6 (my baby)
1992 Taurus SHO MTX (my toy-almost Supercharged)
2004 Nissan Murano SL AWD (Wife's car)