poor mpg
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Joined: Mar 2010
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From: Upstate NY
poor mpg
checked my mpg today when topping off, 15.2 mpg not sure if thats low or not, most driving is highway under 70 mph, I know that my front axle is locked because the hubs broke so that could take away like 1 mpg right? shouldnt I be getting like 18mpg?
truck has a aftermarket spectre air filter, bought it that way but its the only mod, havent towed anything
fuel bowl has rebuild seal kit I installed and the filter looked clean, I rarely shift over 2200 rpm
maybe I could clean the ebpv tube and sensor, I heard that can increase mpg
I'm going to buy new hubs this weekend when I get paid hopefully with the front axle free it will give me another mpg back, I know the saying "if your worried about gas mileage dont drive a truck" but I would atleast like to achieve 17mpg on the highway going 65 mph empty
truck has a aftermarket spectre air filter, bought it that way but its the only mod, havent towed anything
fuel bowl has rebuild seal kit I installed and the filter looked clean, I rarely shift over 2200 rpm
maybe I could clean the ebpv tube and sensor, I heard that can increase mpg
I'm going to buy new hubs this weekend when I get paid hopefully with the front axle free it will give me another mpg back, I know the saying "if your worried about gas mileage dont drive a truck" but I would atleast like to achieve 17mpg on the highway going 65 mph empty
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From: Battle Creek, NE
That's around what I average. 18 miles one way to work with two stops and four corners. Hiway,I haul....well you know,so I don't really check mileage,but i think my last trip to texas it was around 16.5 averaging 80 mph.
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From: Upstate NY
I'm doing 62 mph and getting 15mpg so something must be up with my truck
I guarantee if you were going slower your mpg wouldve went up
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From: Upstate NY
did your truck have any other symptoms besides the poor fuel mpg for the ipr?
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From: Battle Creek, NE
Probably would. I don't have the patience I guess. 
I also have modds n tunes that support mileage gains. Changing or upgrading to the T-500 hpop helped with my mileage,and live tuning with Tony W picked me up another 1 1/2 mpg. Lots of options I guess. Clean oil,filters,ipr,proper tire psi,hanging brakes,tire size,boost leaks,etc.. Just got to weed your way through your truck n see what helps you and your driving styles.
I also have modds n tunes that support mileage gains. Changing or upgrading to the T-500 hpop helped with my mileage,and live tuning with Tony W picked me up another 1 1/2 mpg. Lots of options I guess. Clean oil,filters,ipr,proper tire psi,hanging brakes,tire size,boost leaks,etc.. Just got to weed your way through your truck n see what helps you and your driving styles.
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Joined: Aug 2009
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From: Missouri
Any more info on the fix?
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From: Upstate NY
Probably would. I don't have the patience I guess. I also have modds n tunes that support mileage gains. Changing or upgrading to the T-500 hpop helped with my mileage,and live tuning with Tony W picked me up another 1 1/2 mpg. Lots of options I guess. Clean oil,filters,ipr,proper tire psi,hanging brakes,tire size,boost leaks,etc.. Just got to weed your way through your truck n see what helps you and your driving styles.
I also have modds n tunes that support mileage gains. Changing or upgrading to the T-500 hpop helped with my mileage,and live tuning with Tony W picked me up another 1 1/2 mpg. Lots of options I guess. Clean oil,filters,ipr,proper tire psi,hanging brakes,tire size,boost leaks,etc.. Just got to weed your way through your truck n see what helps you and your driving styles.Ahhh I see I see.
well I do have one issue that I think could cause mpg issues
the injector o rings, the truck smokes hard on the first start of the day, rich diesel smell, its not glowplug related either, its strange though sometimes it plumes and sometimes if just puffs, it even did it when it was 80 degrees outside pluming up the neighborhood
as far as I can tell theres no oil in coolant and no diesel in the oil, fuel filter is not black
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From: Western Kentucky
I had to install a new HPOP. I am wondering if the stuck IPR caused it to run full pressure and cause damage.
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From: Damon (South East Texas)
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From: Upstate NY
any thoughts on injector o rings? most threads ive read on injector o rings are explained that the truck smokes on first start of day real bad because the o rings are stiff nd dont seal well when the engine is cold
the previous owner says he replaced the injector o rings but I dont know how true that is
not sure what else this smoke could be from, started the truck this morning about 38 degrees and it smoked pretty bad for a minute before calming down, glow plugs are working the truck fired right up too
the previous owner says he replaced the injector o rings but I dont know how true that is
not sure what else this smoke could be from, started the truck this morning about 38 degrees and it smoked pretty bad for a minute before calming down, glow plugs are working the truck fired right up too
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Joined: Mar 2003
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From: Western Kentucky
any thoughts on injector o rings? most threads ive read on injector o rings are explained that the truck smokes on first start of day real bad because the o rings are stiff nd dont seal well when the engine is cold
the previous owner says he replaced the injector o rings but I dont know how true that is
not sure what else this smoke could be from, started the truck this morning about 38 degrees and it smoked pretty bad for a minute before calming down, glow plugs are working the truck fired right up too
the previous owner says he replaced the injector o rings but I dont know how true that is
not sure what else this smoke could be from, started the truck this morning about 38 degrees and it smoked pretty bad for a minute before calming down, glow plugs are working the truck fired right up too
He could have cut or rolled one or two when he replaced them. Sure sounds like O'rings.
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Joined: Mar 2003
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From: Western Kentucky
Watch for oil or diesel flowing back into the cylinder and locking your piston. I use a small shop vac and suck all fluids out of the cylinder. A little messier way is to turn the key over and blow it out. I locked one once. Scares you a little when the engine won't turn over. I have also used a long ratchet on the harmonic balancer and turn it forcing it through the valves.