2002 F350 7.3L fuel millage. - Ford Powerstroke Diesel Forum
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Old 04-01-2013, 01:21 PM
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2002 F350 7.3L fuel millage.

Hey, Does anyone out there have any Ideas on how to get better fuel millage out of my 7.3L powerstroke? I have cleanned the exhaust back pressure tube but didn't change the sensor? how do I know if sensor is bad? not getting any codes relatted to exhaust back pressure sensor so I didn't expect it to be bad. I do have it jacked up on 37inch tires, but I have installed a bully dog programer, K&N cold air in take, 4inch down pipe from turbo that goes into 5inch stacks with no muffler or convertor. I tried turnning programer up to tow, performance, and extreme but just made it harder on fuel. I also changed the diffs to to 4.30 instead of the stock 3.73 to try and get gear ratio back to stock. Should I start checking injectors and if so hows the easyest way?
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Old 04-01-2013, 01:24 PM
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What are u getting? I get 12.5
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Old 04-01-2013, 01:45 PM
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Put the truck back to stock height and gearing. Aerodynamics suck on lifted trucks. If you have mud tires go back to a highway tire or at the most an all terrain. I know it doesn't look as cool, but a big lift, big tires, and aggressive tread doesn't perform as well on the highway. And maybe a better custom chip with an economy tune. And before doing anything I would make sure the truck is operating as it should......no boost leaks, injectors operating as they should, brakes not hanging up, etc.
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Old 04-01-2013, 01:54 PM
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Quote:
Originally Posted by belz View Post
What are u getting? I get 12.5
Im getting 400km to 90L of fuel. I tried figureing out the mpg and I got 2.5. That seems pretty bad.
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Old 04-01-2013, 04:28 PM
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I'm not sure how you did your calculations, but here is what I've got for you:

400km = 248.55mi
90L = 23.78gal

248.55mi/23.78gal = 10.45 mpg

I would start simple and ditch the K&N filter for a Tymar 6637 and get rid of the Bullydog and go with either a TS chip with tunes from a reputable tuner (Beans, Tony Wildman, PHP, etc...) or a chip and tunes from DP Tuner. That should start you in the right direction.

Whatever you do, remember, you are driving a very large and heavy truck with 37" tires. You aren't going to get great numbers like 25mpg. I get about 13-16mpg around town and about 18-20 mpg on the highway with the truck in my signature. Good luck!
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