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Old 05-06-2011, 10:01 PM
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Question Help

2nd time ive posted this but need the help quick only really got the weekend to work on it than the truck will be pulling work trailer and booked up for two weeks straight... Getting 10-11 Mpg pulling a 7k trailer used to get 14-16 read all sorts of posts about sensors being out etc but my truck is running great no missing starts up quick etc so i dont think that is the problem... If i am wwong please let me know what it could be With fuel prices here shortly im gonna be dead broke
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Old 05-06-2011, 10:16 PM
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Do you have any mods? Do you notice any excess smoke when driving down the road? Do you use any additives? What is the setup on your truck? CC, LB, Flat Bed, 4x4? The more information people have, the more help they can provide.
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Old 05-06-2011, 10:42 PM
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also what speed are you driving at?

I get about 11-13 towing a 11,000 lb 5th wheel if I keep it about 75 (depending on wind speed , direction, terrain, etc) but I am closer to 15 at 68 mph with the same 5th wheel rv
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Old 05-06-2011, 10:45 PM
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Thats in town dont do a hole lot of highway on and off Its stright piped no cats 4inch turbo back and airaidd exhaust... Ext. Cab short bed 4x4 and use diesel service cetane boost
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Old 05-06-2011, 10:46 PM
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airaid intake**
and thanks guys
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Old 05-06-2011, 10:47 PM
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no more smoke than ussuall .. sorry keep reading back over it and relising i missed stuff
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Old 05-07-2011, 11:29 PM
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How recently have you changed your fuel filters? Your oil and filter? Did you notice any oil being "made"? What weight oil are you using?

The reason I ask about the oil is you could try going with a 10w30 for oil and see if that helps any. Seeing you are in Colorado, you won't see the temps that we do down south so the 30w shouldn't cause any problems.

My first guess--and I do mean guess--would be an injector that may be sending extra fuel. But with no more smoke than usual that kind of negates that.

The best thing to do on these trucks is to put it on a quality scanner. Snap-On, Auto Engenuity or something similar.

Also some people don't agree with this, but it could be where you are getting your fuel. If you are using the same place over and over again I would try going somewhere different. I notice big differences (i.e. 2-3mpg sometimes) depending on where I buy fuel at.
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