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Need Some Advice
Ok guys heres the run down first,
2006 F250 ccsb, 3.73 rear end, 6 inch lift on 37's
Studded, egr delete, egr cooler blocked off, MBRP dual exhaust no cat. K&N air intake
Powermaxx turbo, airdog II, Vivan tune (looney), stock injectors
I've had Vivan re-due the tune 3 times due to turbo lag and shuttering at low rpm. (by the way great service) and it is running very well at this time.
Here is my question....
From what I am reading, there is a little turbo lag with the Powermaxx and I will have to except that. But What I am having trouble living with is the POOR mileage. I have not done any highway with the truck since I bought it due to where I live and most of my driving is city. But in the future it will be city 70% highway 30%. Quick hand calculations with all the above is around 10 mpg. I am correcting for the rolling mass of the tires when I do hand calcuations.
Any ideas why my mileage is so bad? Are the tires too big for the gears? Is the airdog II just dumping too much fuel? Does the FICM hurt mileage? Is my Colorado 5500 ft altitude hurting mileage....PLEASE HELP!