I want better mpg. Do those chips/modules connected to ait sensor via two wires really work? I removed the resonator box just to see inside of it and is empty i was thinking it had baffles like a muffler is that normal? Also in that box there are no sensors only a hose that goes from the box to to the back top of motor which way does is it supose to flow to box or to motor because i put my thumb over(after removing box) and felt no flow? And inside throttle body is dirty. What happens if i put a cone filter right on tb and what do i do with that hose? I am at 13 mpg.