Well I took off the intake, cleaned the t.b. and the MAF sensor w/some electronic cleaner then reset the ecu and the code has gone away, but it seems like it only comes on when i'm merging onto the highway at highspeeds at major wide open throttle. I have never done the fuel filter, i guess that could be clogging up but i dont have any other symptoms of a fuel delivery problem at all. Vacuum leak very possible but how do i check for that? also it does have the stock Yota plugs in it w/less that 10k on them.