uumm LOL but i think all my expedition needed was sefoam and a good intake cleaning i didnt think of cleaning my intake and seafoaming the gas, intake and engine! i got a whole lot of power! cuz i notice that my pedal was getting stuck so i though the throttle so i sparyed it down with wd40 and not much diff, so then i look inside of the throttle and man it had so much carpon built up it wasnt even funny it look like mud!that was the last think i would have checked so if ur truck has more then 225,000 miles+ SEAFOAM IT

 

Last time i check my brother expedition we discoverd it was a 99 4.6 which is a NoN-pi,right? but i heard that people said u need tune the truck in order to run pi----im confused