Hey Franko6, here is one for you... I know the nozzles/injectors are not the problem as they are freshly rebuilt, but no matter what tune I program in, more fuel, less fuel, more timing, torque tapering, over a dozen options, and best I can get in town is 38 MPG. There are many on these forums that profess 45 MPG in town, and well over 55MPG on the highway. I know some of them, and I know they telling the truth; similar hardware...vnt-17, .216 nozzles, and 24 PSI tunes. I have an almost invisible haze at full throttle, so I question too much fuel. Here is the real kicker, I get the same FE with the IQ at 4.2 and with the IQ at 6.5. There does not seem to be any power loss at 6.5, I wonder what the real problem is?