any ideas?
Thread Starter
|
New User
Joined: Dec 2006
Posts: 19
Likes: 0
any ideas?
hi i bought a 2003 crew cab f250 with the 7.3 with a auto about a month ago. my milage is 1o mpg thats mixed driving. i cleaned the ebv tube, it wasnt plugged. i tightened all my ic boots and intake spider boots. i changed the drivers side up pipe donut that was leaking. the pass side has a very small amount of soot around the flange i still need to change it. put a new k&n air filter in it, fuel filter and changed the oil. it has 86,000 miles banks 4 inch exhaust, ts 6 position chip,banks big head wg acuator, k&n intake.my boost seems a little low in stock setting i can only get 14 psi max and it runs around 2or 3 at 70mph.the guage is electronic i dont know if its right, any other things to look at, i read about everyone getting around 17mpg that why i went to a diesel, and it get the same as my 460 1 ton truck.it seems to run good and idles smooth.thanks for your time
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Sounds like you've covered most of the regular issues. How high do the RPM's get when your accelerating? Is your turbo stock or has it been upgraded? Any lift or oversized tires? Who's tunes are on the TS chip? Do you have a stock setting you can try to get a baseline comparison on mileage?
Senior User
Joined: Nov 2008
Posts: 323
Likes: 0
From: Socal.......Kinda
Just throwing this out there......
I have a '03 6.0 with a ton of lift, edge programmer, air raid intake, RBP 5" exhaust and 44's on it and I get around 10 MPG combined HWY and CTY. Not sure if the 7.3 get's worse or better typically. Guys on here will definately have some info for you though. One thing I KNOW they are going to say is get rid of the K&N as soon as possible. K&N's supposedly let larger particles get through to the turbo which can cause problems in that area. They (yes they talk alot) will tell you that stock is better than having the K&N. I know none of this really helps you, apologies, basically just giving you a thread boost. Hope all works out for you.
I have a '03 6.0 with a ton of lift, edge programmer, air raid intake, RBP 5" exhaust and 44's on it and I get around 10 MPG combined HWY and CTY. Not sure if the 7.3 get's worse or better typically. Guys on here will definately have some info for you though. One thing I KNOW they are going to say is get rid of the K&N as soon as possible. K&N's supposedly let larger particles get through to the turbo which can cause problems in that area. They (yes they talk alot) will tell you that stock is better than having the K&N. I know none of this really helps you, apologies, basically just giving you a thread boost. Hope all works out for you.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
Just throwing this out there......
I have a '03 6.0 with a ton of lift, edge programmer, air raid intake, RBP 5" exhaust and 44's on it and I get around 10 MPG combined HWY and CTY. Not sure if the 7.3 get's worse or better typically. Guys on here will definately have some info for you though. One thing I KNOW they are going to say is get rid of the K&N as soon as possible. K&N's supposedly let larger particles get through to the turbo which can cause problems in that area. They (yes they talk alot) will tell you that stock is better than having the K&N. I know none of this really helps you, apologies, basically just giving you a thread boost. Hope all works out for you.
I have a '03 6.0 with a ton of lift, edge programmer, air raid intake, RBP 5" exhaust and 44's on it and I get around 10 MPG combined HWY and CTY. Not sure if the 7.3 get's worse or better typically. Guys on here will definately have some info for you though. One thing I KNOW they are going to say is get rid of the K&N as soon as possible. K&N's supposedly let larger particles get through to the turbo which can cause problems in that area. They (yes they talk alot) will tell you that stock is better than having the K&N. I know none of this really helps you, apologies, basically just giving you a thread boost. Hope all works out for you.
Senior User
Joined: Nov 2008
Posts: 323
Likes: 0
From: Socal.......Kinda
Thanks for the kind words Rick. I agree that it is a good, great even, thing that " they talk alot." In my short time on this board I have pulled hundreds of dollars worth of advice. That estimate is on the low side. I was just proud to be the first one to tell him about the K&N. LOL. Should I be upset about the "for a 6.0 guy" comment?
Thread Starter
|
New User
Joined: Dec 2006
Posts: 19
Likes: 0
Sounds like you've covered most of the regular issues. How high do the RPM's get when your accelerating? Is your turbo stock or has it been upgraded? Any lift or oversized tires? Who's tunes are on the TS chip? Do you have a stock setting you can try to get a baseline comparison on mileage?
Trending Topics
Thread Starter
|
New User
Joined: Dec 2006
Posts: 19
Likes: 0
i can hit around 22 psi on my 140 setting. stock i can hit 14
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
New User
Joined: Dec 2006
Posts: 19
Likes: 0
so what maybe the k&n hurt the engine thats why i can only get 10mpg
Senior User
Joined: Nov 2008
Posts: 323
Likes: 0
From: Socal.......Kinda
I really don't know??? I was just posting that to tell you about the K&N issue and to try and keep your post on the front page so you could get some more advice. I guess it is possible that it may have caused damage and a resulting loss in power and or MPG. Do you know how long the previous owner had it on there?
Lead Driver
Joined: Nov 2007
Posts: 5,578
Likes: 1
Thank you for the kind words Jimmy! Heres my guess... K&N lets dirt through theres a link to show you that... If it has had one before and still has one my guess is that your turbo wheel is eaten up = low boost. Low boost will rob you of MPG's. Pull your intake tube and look at the wheel... If the edges are rounded AT ALL your turbo is southbound for sure. Reach in there and feel if the turbo wheel has ANY play... When you t-wheel eats dirt it will ruin the bearing and create play. Heres your hope! That enough dirt hasnt got past your turbo to hurt the motor... If it has you may be looking at a Low compression issue. But that is usually accompanied by white smoke and other issues...
heres the air filter study...
ISO 5011 Duramax Air Filter Test Report
good luck let us know!
heres the air filter study...
ISO 5011 Duramax Air Filter Test Report
good luck let us know!
Thread Starter
|
New User
Joined: Dec 2006
Posts: 19
Likes: 0
Thank you for the kind words Jimmy! Heres my guess... K&N lets dirt through theres a link to show you that... If it has had one before and still has one my guess is that your turbo wheel is eaten up = low boost. Low boost will rob you of MPG's. Pull your intake tube and look at the wheel... If the edges are rounded AT ALL your turbo is southbound for sure. Reach in there and feel if the turbo wheel has ANY play... When you t-wheel eats dirt it will ruin the bearing and create play. Heres your hope! That enough dirt hasnt got past your turbo to hurt the motor... If it has you may be looking at a Low compression issue. But that is usually accompanied by white smoke and other issues...
heres the air filter study...
ISO 5011 Duramax Air Filter Test Report
good luck let us know!
heres the air filter study...
ISO 5011 Duramax Air Filter Test Report
good luck let us know!
Lead Driver
Joined: Nov 2007
Posts: 5,578
Likes: 1
White smoke as mentioned above... would be unburnt fuel. Another great cause of poor MGP. Motor went about 6 months after i bought it. We traced the issue to being low compression in #8 = a bad piston or cyliner wall... due to dirt
