6.7 mpg decreasing
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Freshman User
Joined: Mar 2010
Posts: 27
Likes: 7
From: DFW
6.7 mpg decreasing
I have a 2018 F250 6.7 been driving it for about 2weeks now and seem/feels like something’s just not right with the truck. I have it deleted(EZ) for years with no issues. So long story short made a 4hr drive and about half-way my MPGs while watching my gauge was dropping about .3-.5mpg while in cruise control I know it’s not a lot but it feels like the truck is really having to work almost like towing or the parking break is on. Is this an injector going bad? I have 78k on it have used additive throughout its life and still so I should have clean fuel.
Lead Driver
Joined: Nov 2005
Posts: 8,466
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Additives don't make your fuel clean.
I take it you have no codes showing?
Bad injectors should show a misfire and throw a code.
Making full boost?
Need to get it to someone that has a dealer level scan tool, so you can see live sensor data.
I take it you have no codes showing?
Bad injectors should show a misfire and throw a code.
Making full boost?
Need to get it to someone that has a dealer level scan tool, so you can see live sensor data.
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Freshman User
Joined: Mar 2010
Posts: 27
Likes: 7
From: DFW
Also wanted to mention that I have my tuner on lately to see if anything jumps out and only thing I see is that it will show like 30+% engine load in 6th gear on cruise control when climbing like a small hill/incline normal hgwy use and more turbo psi.
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Freshman User
Joined: Mar 2010
Posts: 27
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From: DFW
Needs and work, have you ever seen a 1/2ton pulling around a skid steer. If you have got pics?
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Lead Driver
Joined: Dec 2020
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I'm confused, why does the purchase price of the truck matter? And who said anything about the OP's truck actually being an "almost $100k" truck? All I see is that it is a 2018 with 6.7l..
I wish deleting was a viable option for me. Out of warranty, and if the emissions system satrts to take a crap, it would be nice to have that option.
I would look into Forscan to see if it offers any injector diagnosis tools.
I wish deleting was a viable option for me. Out of warranty, and if the emissions system satrts to take a crap, it would be nice to have that option.
I would look into Forscan to see if it offers any injector diagnosis tools.
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Thread Starter
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Freshman User
Joined: Mar 2010
Posts: 27
Likes: 7
From: DFW
No winterizer yet, it’s still 75 here in Texas ha.
Hotshot
Joined: Oct 2006
Posts: 10,156
Likes: 7,990
From: Texas
But that does not mean that the fuel suppliers haven’t changed to a winter blend. They *generally* do that by the calendar……..I.E. maybe in your area Dec 1 might be the magic date every year. Further north it is probably like Oct 1.
Fleet Mechanic
Joined: May 2018
Posts: 1,765
Likes: 502
especially after what happened in Texas last year, you could be on the winter blend.