Poor fuel mileage - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 12-29-2012, 05:18 PM Thread Starter
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Poor fuel mileage

Hey i know this has been said probably a million times but i think i have a different issue. So i have a couple questions, the first is what sensor could cause this i cleaned the tube for the exhaust sensor is there a way to test that to see if it is working. also what else could it be. i got a new tune that i dont really like could that cause a huge difference i mean i am only getting like 10 MPG that is horrible and it is getting worse i think... please help

2002 F-250 7.3l 190K
str8 piped exhaust
T4 mount s366 turbo
6637 W/ zoodad
TW custom tunes
18" rockstars with nitto terra grapplers
Pioneer avic-f700bt
Piller mount gauges autometer pyro/boost/tranny
F650 dash w/ fuel pressure and air pressure
Fisher 7.6 HD plow
BTS Transmission
And lights everywhere
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post #2 of 9 Old 12-29-2012, 06:10 PM
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10mpg?.. My dually in town and in 4x4 today was seeing 12.9. Roads were a mess!

currently driving a 335i bmw, no more powerstoke

Previous powerstrokes-
2002- F250 XL 7.3 auto, 4x4
2001- F250 Lariat 7.3 auto, 4x4
2002- F350 Lariat 7.3 Dually, auto, 4x4. 141k miles
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post #3 of 9 Old 12-31-2012, 12:00 AM
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The list is almost endless. Get AutoEnginuity or go to a reputable diesel shop and run a diagnostic test.

Sent from my Galaxy Nexus using AutoGuide.Com Free App

E99CCLB 450/400s,STG1cam, KC38R, 4" exh,CNC FAB fuel&oil lines,140vIDM,BTS,S&B

97 ECLB F250 4x4 stock
96 CCLB F350 4x4 stock



EDGE,S&B,SCT,PHP Hydra,TS-Perf,OEM parts,Sam Wyse trans,VB's,LED's,MBRP,ISSPRO,ICON,FOX,KC TURBOs,SD 7.3 fuel kits, HPOP lines

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post #4 of 9 Old 01-04-2013, 04:45 PM Thread Starter
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ya i dont know any good shops around the ct area does anyone else? but i really need to get this fixed does anyone have an idea that could start to point me in a right direction??!!

2002 F-250 7.3l 190K
str8 piped exhaust
T4 mount s366 turbo
6637 W/ zoodad
TW custom tunes
18" rockstars with nitto terra grapplers
Pioneer avic-f700bt
Piller mount gauges autometer pyro/boost/tranny
F650 dash w/ fuel pressure and air pressure
Fisher 7.6 HD plow
BTS Transmission
And lights everywhere
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post #5 of 9 Old 01-04-2013, 06:40 PM
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Brakes, tires, oil, map sensor, ebpv, ebp tube and sensor, icp and icp sensor, turbo, diff, trans, torque convertor, wind, warm up, speedo along with how you calculate mileage, ac on/off, stuck pulley/fan clutch, 4wd hubs locked, towing/not, driving style, oil, fuel pressure, on and on and on

I made my Samsung SGH-I997 send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #6 of 9 Old 01-04-2013, 07:42 PM
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At the very least take it to a shop that can hook it up to a computer. $50-$80 for a diagnosis is much cheaper than throwing parts at it. Bite the bullet and take it in.

E99CCLB 450/400s,STG1cam, KC38R, 4" exh,CNC FAB fuel&oil lines,140vIDM,BTS,S&B

97 ECLB F250 4x4 stock
96 CCLB F350 4x4 stock



EDGE,S&B,SCT,PHP Hydra,TS-Perf,OEM parts,Sam Wyse trans,VB's,LED's,MBRP,ISSPRO,ICON,FOX,KC TURBOs,SD 7.3 fuel kits, HPOP lines

www.cncfab.us or email sales@cncfab.us

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post #7 of 9 Old 01-05-2013, 04:33 AM
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But the shop needs to be able to read live data and know what to look for, not just scan codes and say I dunno

I made my Samsung SGH-I997 send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #8 of 9 Old 01-05-2013, 05:11 AM
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True but one has to start somewhere. Just asking random people on the internet is not going to solve his problem.

To the OP, look up on the Better Business Bureau and see what people have to say about shops in your area. Or if you feel you are competent enough and plan on keeping your truck around for a long time, buy the AutoEnginuity and fix it yourself. Some sensors are quite expensive and just throwing new ones on it can easily surpass the price of AE and still not have it figured out.

E99CCLB 450/400s,STG1cam, KC38R, 4" exh,CNC FAB fuel&oil lines,140vIDM,BTS,S&B

97 ECLB F250 4x4 stock
96 CCLB F350 4x4 stock



EDGE,S&B,SCT,PHP Hydra,TS-Perf,OEM parts,Sam Wyse trans,VB's,LED's,MBRP,ISSPRO,ICON,FOX,KC TURBOs,SD 7.3 fuel kits, HPOP lines

www.cncfab.us or email sales@cncfab.us

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post #9 of 9 Old 01-19-2013, 11:16 PM
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Here I go again up on the soap box. The 10mpg and rising prices made me lonk at how the fuel system was working and how it should work. I put a pusher pump in the back with a RSD built air fuel unit and finnished off the rest of the air and vapor issues with the pressue rise. I got all new tunes to work with the fuel system. My 8400lbs. truck gets 16.8 intown and 224 on highway. I'm a happy camper now. One more thing I had my arm twisted to do wasto run a model of the exhaust on Boing aircrafts flow bench ans my friend told me how to get the most through it.

The Ex -box. Total RSD system. See what happens when you let attorneys run your Country!!!! There's nothing wrong with a Democratic society, we just need to get rid of Democrats. 2001 Excursion. 2003 Cobra Terminator all pumped up. Now this is fuuuuuun.
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