Originally Posted by Big Jake
I have a 1996, with the 4.9 and its getting about 18 mpg. Im wondering if a throttle body spacer and cold air intake might improve the mileage any? I was thinking it may get at least 3 more miles per gallon. Does anyone know for sure?
Maybe very slightly but not 3MPGs. What would also help would be a freer flowing exhaust, proper injectors and timing, along with a half decent cam. Ford really crippled the 4.9Ls from the factory so they would have less HP than the 5.0L, they still have more torque though.