i Pusrchased my 2005 titan se big tow used from a dealership. it has atermarket rims, tires & runningboards. looks like somone did a little customization. what i am trying to find out is if there is any way of telling if the somone has powertuned the computer. it has ridiculous power and it does not seem to have the WOT restriction ( i can burn the tires to the ground). is there anyway of telling if someone has reprogramed my truck? oh yea also the truck only gets about 14mpg. i would think if somone has tuned it i can de tune it and save a dollar or two on gas