i found out that the problem was from the inter-cooler being clogged cause the IAT2 temps to sky rocket and cutting timing. but the truck still doesn't run 100%. i bought i t from someone who says it was a new motor on a safe tune so i figured that the shitty gas mileage and awkward performance was caused by a not so good tune. but im starting to think that i need to look in to the Y fitting and see if its the main problem. would i have to take the bed off to get to it? could the bad Y fitting cause bad gas mileage?