7.3 upgrades - Ford Powerstroke Diesel Forum
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post #1 of 29 Old 02-24-2013, 06:13 PM Thread Starter
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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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post #2 of 29 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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post #3 of 29 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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post #4 of 29 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.


2000 DRW CC 7.3
Exterior: 08 Exterior Clone, 22.5's
Engine Mods: GTP38R WW2, 5 inch exhaust,T500, 6637, TW tunes,DI Up pipes, 6.7 fuel pump fuel system.
Trans Mods: 6.0 trans cooler, JW Valve body,Billet triple disc converter.
Sound Mods: 7" flip out tv, 3-way speakers all around, 12" sub, 500 watt amp.
Misc:dieselsite coolant filter, max ac assist, BRV, IHD,gauges, CCV

Next up power rear window
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post #5 of 29 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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I live close to ocala and surrounding areas, so if anyone ever needs a hand with their truck....get a hold of me.
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post #6 of 29 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

2001 F350 SRW CC 4WD LB
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post #7 of 29 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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post #8 of 29 Old 02-26-2013, 03:47 PM Thread Starter
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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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post #9 of 29 Old 02-26-2013, 03:52 PM Thread Starter
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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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post #10 of 29 Old 02-26-2013, 03:59 PM
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Are you hand calculating?



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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