mpg question.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
Hey Tom, i would defintly do what the guys said above about cleaning the EBPS tube, Dan got the link for you. I cleaned mine and it had some soot in the bends but mostly towards the end. Its a rule out fix and it could help. Gottya on the no tuner..
Senior User
Joined: Dec 2003
Posts: 170
Likes: 0
From: Union Grove, Wisconsin
Like the other guys said, clean or replace the tube. Mine was almost completely plugged so I made a new one. Helped my mpg. With winter, your tire pressure goes down. Make sure you have the recommended psi. Keep the rpm's below 2k. Keep us updated.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
One thing that made a big difference in mileage for me was sealing the up pipes. Bought me 1.5-2 mpg.
Mileage is still pretty low, 4.88's and a 10k truck aren't famous for good fuel economy.
And I think you have a boost leak somewhere with your boost gauge flicking like that. Possibly a loose clamp or maybe a plenum gasket has lost it's seal.
Mileage is still pretty low, 4.88's and a 10k truck aren't famous for good fuel economy.
And I think you have a boost leak somewhere with your boost gauge flicking like that. Possibly a loose clamp or maybe a plenum gasket has lost it's seal.
Thread Starter
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i ain't rite
Joined: Mar 2005
Posts: 65,429
Likes: 5,509
From: Marlboro Mental Hospital.
well, stage one in the MPG fix was done today. it finally stopped raining, and the temps were around 31º, 
so i got the new fuel filter put in.
YUCK!!!
it looks like it is the original filter in there!!!
the pre filter was black, and there was "mud" dripping off of it when i pulled it out.
the filter itself was almost as bad.
i ended up sucking all the fuel out of the bowl, and wiping it clean, then filling it up with MACS 9600 (because i couldn't find any DK in the garage), and took it for a fill up and spin around town. i reset the overhead console, and put it through the paces.
results are::
beating the snot out of it, it has more getup and go.
and the mileage is sitting rite at 14.6, where before the filter change, this kind of driving would result in a single digit reading.
so all in all, i am a bit happier.
now all i got to do is the CCV mod, check for plenum leaks, check the EBPS tube, and put new boots on it.
so i got the new fuel filter put in.
YUCK!!!
it looks like it is the original filter in there!!!the pre filter was black, and there was "mud" dripping off of it when i pulled it out.
the filter itself was almost as bad.
i ended up sucking all the fuel out of the bowl, and wiping it clean, then filling it up with MACS 9600 (because i couldn't find any DK in the garage), and took it for a fill up and spin around town. i reset the overhead console, and put it through the paces.
results are::
beating the snot out of it, it has more getup and go.
and the mileage is sitting rite at 14.6, where before the filter change, this kind of driving would result in a single digit reading.
so all in all, i am a bit happier.
now all i got to do is the CCV mod, check for plenum leaks, check the EBPS tube, and put new boots on it.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Not good on the filter Tom. Remember those fuel injectors are around $300 ea. so you might want to pay a bit more attention to the change interval. Geno's garage has a good price on the Racor filters if you decide to stock up while this is fresh on your mind.
Thread Starter
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i ain't rite
Joined: Mar 2005
Posts: 65,429
Likes: 5,509
From: Marlboro Mental Hospital.
it wasn't all my fault Chris. i have only had the truck for a year, and put 10k miles on it. i do fuel filters every other oil change, or 10 k.
the truck was supposedly all new filters when i got it.
i will look at the fuel filter again at the next oil change.
as for the filter, i got the NAPA Gold for $24
i kinda sorta like the new design of the NAPA filter. all one piece.
the only thing i don't like is the wrench head on the cap, instead of the ratchet extention socket in the stock filter cap.
the truck was supposedly all new filters when i got it.
i will look at the fuel filter again at the next oil change.
as for the filter, i got the NAPA Gold for $24
i kinda sorta like the new design of the NAPA filter. all one piece.
the only thing i don't like is the wrench head on the cap, instead of the ratchet extention socket in the stock filter cap.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Just make sure not to lose the old cap in case you switch back to the other style.
Keep an eye on the new filter. If it starts to get dirty real fast, you might need to drop the tank and clean the screens in the mixing chamber. If there's junk in the tank, the screens may be partially plugged and you may have a fuel restriction. Might be a good time for the in tank mods if you drop the tank. Welcome to guzzle's In-tank Hutch Mod Web Page
Keep an eye on the new filter. If it starts to get dirty real fast, you might need to drop the tank and clean the screens in the mixing chamber. If there's junk in the tank, the screens may be partially plugged and you may have a fuel restriction. Might be a good time for the in tank mods if you drop the tank. Welcome to guzzle's In-tank Hutch Mod Web Page
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i ain't rite
Joined: Mar 2005
Posts: 65,429
Likes: 5,509
From: Marlboro Mental Hospital.
the old cap and prefilter are on the shelf as keepers. i never toss parts like that ,so i still have it just in case the "newfangled" stuff is not as new and improved as they thought it was.
cleaning the tank is a thought that came to mind as soon as i saw the filter condition. if the new one is just as dirty in 5k miles, out comes the tank.
cleaning the tank is a thought that came to mind as soon as i saw the filter condition. if the new one is just as dirty in 5k miles, out comes the tank.
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
And something else to consider. If you're not going more than 25 miles from home, you're probably not doing a lot of highway miles. The diesel is most efficient when it's up to full operating temp holding a steady speed.
If you're doing a lot of stop and go driving, and you're tach is going over 2,000 rpm's while you accelerate, that can explain the poor mileage.
If you're doing a lot of stop and go driving, and you're tach is going over 2,000 rpm's while you accelerate, that can explain the poor mileage.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Look for leaks where the up pipes connect behind the turbo. Hard to see, but there will be black streaks on the pipes or firewall if you have a leak. Replacing the donut gaskets or installing bellowed up pipes will fix the leak.
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
I put a set of those bellowed up-pipes on. Eliminates that problematic o-ring seal.
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