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Old 02-24-2013, 06:13 PM
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7.3 upgrades

Hey, I am now the owner of a 2003 7.3. I owed a 6.0 but had to let that money pit go. I bought a f150 with 5.4 but not like my diesel. I recently found and bought a 2003 with the 7.3. I have a few questions I hope someone can help me with. First it has the 4" exhaust system and I just added an air raid, guages and dp tuner. I got 17.4 without the tuner but lost mileage with the tuner. I think I need a different highway mileage tuner. Is there anything else I can do to get better mileage around town and highway. I know to keep the rpms below 2. The mileage is 230000 on the truck, could my cam sensor or something else need replaced or checked. Thanks for anyone's help.
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Old 02-24-2013, 11:28 PM
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How much mileage did you lose? What tune are you running in?
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Old 02-25-2013, 04:24 AM
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What kind of fuel are you running? winter blend, bio...
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Old 02-25-2013, 05:40 AM
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Egt's, boost numbers.. Could be an exhaust leak, might not be tune related.
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Old 02-25-2013, 05:42 AM
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7.3 upgrades

You could give the ol' EBPS tube a cleanin. Check on here or you tube for a how to. Free and simple maintenance project


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Old 02-25-2013, 03:33 PM
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Plus keep your foot out of it. We have a tendency to be a little heavy on the pedal when we have more power that we aint used to
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Old 02-25-2013, 03:39 PM
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dont think the cps makes much of a diff on fuel mpg i was hoping it would help mine out and it didnt i switched from the crappy grey to a black delphi it seems to idle better and maybe run better hard to tell forsure though
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Old 02-26-2013, 03:47 PM
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I went from 17.4 stock to 15.6 with the 80hp econ tune. I am running reg diesel. I have tried different stations looking for a better quality but all seem to be around the same in mileage per gallon. I will be checking the ebps this weekend. Thanks
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Old 02-26-2013, 03:52 PM
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In my original post I made a statement of keeping the rpm's below 2. I don't floor it to start or get to myp cruising speed. I think I will try a 60hp tune
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Old 02-26-2013, 03:59 PM
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Are you hand calculating?
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fuel mileage, tuners, upgrades

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