7.3 horrible fuel mileage

rusty1161 · Apr 2, 2015

Winter fuel?

Rusty

Powerstroker91 · Apr 2, 2015

Possibly.. But i doubt it its never been this bad. Even with winter fuel i usually get 12-13 i dont really drive my vehicles hard and i go 80 miles and my gauge is halfway between full and 3/4... Its a little off but last time i checked i went 80 miles then filled it up it toke 8.43 gallons which would be 9.49mpg... Something aint right i have no load on the truck... Nothing in the bed... Stock tires stock wheels..

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Arisley · Apr 3, 2015

Cool that the fins are good.

Have you checked for boost leaks or up pipe leaks?

lincolnlocker · Apr 3, 2015

ghostriderblk said:
I'm in Bethlehem PA and the winter here has put a tole on my 140k 7.3 I moved from Florida so it's not used to it. My milage has dropped as well. I have 12.5 v at start up and 14.5 running so everything should be getting good voltage. I have exact same mods minus inj and Trans. my eps is clogged but I don't think I'll loose 5 mpgs from that. I replaced a fuel pump and hpop outside in January it sucked. Put a scanner on it see what your sensors say maybe a faulty sensor ?

stock tuning?

live life full throttle

Powerstroker91 · Apr 3, 2015

I havent checked for boost or up pipe leaks yet. And i only run the custom tunes on my dp5 tuner.

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lincolnlocker · Apr 3, 2015

im not sure if the ebps is tied into tuning as some may use it. but i would clean the tube and put a new sensor on it. and definitely check for boost and drive pressure!

live life full throttle