i have to be doing something wrong only get 6 mpg unloaded straight highway 65mph recently had fule pump replaced "not the ip pump "
and a new injector line put on and i do not have a turbo "too $$$ "
how can i boost fule mpg i hear about oreo getting 16 mpg unloaded
im like wtf .
1988
f-350
dually super cab xlt lariet
auto tranny 2wd
7.3l

 

actually, i get just over 16 loaded not sure unloaded. i dont even remember the last time ive been able to drive my truck without a trailer behind it. and that was with 37's, 4.10 gears and overdrive never going over 60mph. went from 12mpg n/a to 16.7mpg turbo. sounds like a fuel problem for sure, but while your at it, check for boost/exhaust leaks.

 

how do you check for boost and my exhaust has holes rusted through every where

 

thats a problem there. without your exhaust pressure and heat then your turbo is useless! and checking for boost is easy enough. just pick up a boost gauge and hook it up.

 

oh, the only part of your exhaust that means anything is pre turbo. if your talking about after the turbo then that doesnt effect boost

 

you need a boost gauge to check for that it helps to have one in cause a leak pops outta the blue and you have no power

 

damn oreo!!

 

dont have a turbo
so can ya think of anything else that would help mpg

 

oh damn, sorry.... i read that you did have a turbo. then its your ip or injectors. hows your blowby?

 

hows the exhaust smoke level? how do you drive? that makes a huge difference. if you make every light a race, then thats gonna murder your mpg.

 

thats odd 6 mpg unloaded i get 18 mpg unloaded at 70 mph do you have power loss like it struggles to get up to speed?

 

i am thinking it is time for new ip and injectors if blowby is within normal

 

boost or no boost though 6 mpg lol ouch!
i think my absolute worst with my a/c was running....hang on i'll look for sure lol...... 12.24 and i see i had two problems - the a/c was running and my tire pressure was low in the duals and the front some that tank.
my worst tank ever was still twice 6 mpg.
these are not 460's.



im currently @ 15.21 MPG over the course of 31 tanks.
n/a
big bed
dually
hauling well over 1 ton often
(those are biggest fuel economy negatives.you'd need to check my garage for all things iv done to help.)

i would start by inspecting the fuel and air filter.the exhaust-mainly looking for a plugged up muffler.
id then jack up each tire and roll them by hand to see if any brakes are locked up.
inspect all fluids.
depending on the mileage id be doing a compressing test,followed by ip and injectors test or replacement if more 100k miles on them.
tire pressure is also important.
engine timing is important,and required after ip and or injectors are changed.checking the timing every year is also a good idea,or at least every 20-30k miles.
does it sound like a powerstoke engine with lots of rattle when you first start it and then quite down a lot?
(even if going by ear isn't good enough.its still supposed to be good enough for at least 10mpg i should think. )

you need to be sure your odo is reading the miles driven accurately.if not,it's all a wild guess.check this first.

"chipper truck"
https://www.ford-trucks.com/forums/i...odelName=F-250

 

i granny the lights
you said something about ip pump
what do ya do whit that
little smoke at start up

 

you can either go to a diesel shop and have yours rebuilt or get a new one (reman) from pensecola. do injectors same time though!