Mileage problem post 2

[dbartos]

Well, I’ve had my fill of some of the local repair shops and their expensive (worthless) expertise. So I’ve decided to dig in and try to get to the bottom of my poor fuel mileage problem myself. I looked the other day in the back of the owners manual and I found a log where the previous owners had recorded their oil changes and maintenance and found it interesting that at 22,770 miles they wrote the following: “had 2 front rotors put on under fact. Warranty. They started trying to find out why fuel mileage low.” What could there be about this truck that would have been causing low mileage even back then? It currently has 155,000 miles and gets about 13.5 on the highway. I’ve been reading a lot Here and on some of the other forums and as a result here are some of the things I intend to check. #1. I want to make sure the wastegate actuactor is working corectly and is not stuck open. #2. I also want to check to see that the fuel return line is not pluged or broken. #3 I want to make sure I’m not loosing boost in the intercooler or anywhere between the turbo and the intake.
If anyone here can think of anything else that I might check I would welcome you’re advise. I’m not much of a mechanic, but I think I can do some of the simple stuff. I’m already convinced that you guys know more about these trucks than the repair shops and I’m glad I found this web site. Thanks you guys!