Hey guys, I have a 2000 tacoma 3.4 to which I have done the deck plug mod to the air box and the ISR mod to the intake tube. This was done about 2 years ago but recently I have had the check engine light one and the code is P0171 (bank 1 lean). It has been at my local dealer for the past 3 days and the best they could come up with is the mods are causing the code. Some how I do not beleave this. Mainly because I am only getting 7mpg and if I park the truck against a wall I leave a nice black mark on it from my exhaust, which would indicate to me that I am running rich? Does any of this make sence to you guys or have any of you had a similar problem? I have changed both O2 sensors and the Mass Air Flow sensor as well as the filter itself. I am now officialy lost.