Want to get better MPG for my 7.3! - Diesel Forum - TheDieselStop.com
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Upgrades and Aftermarket - 99 & up 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 12-25-2009, 08:56 PM   #1 (permalink)
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Want to get better MPG for my 7.3!

Right now im getting about 12 city and 14 highway,
i want better. When i drove down to Arizona for school,
i was only getting 14 mpg highway. I have a TS6 position
chip with stock,high idle,50,70,100,140(settings) I drove
down with it on 70, and got only 14mpg. what can I do
to get better mpg without loosing performance?? Also
what chips do you recommend!

Thanks shayne

early 99 F-350(7.3)
TS6 position
K&N cold air intake
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Old 12-25-2009, 09:44 PM   #2 (permalink)
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I get easily 18mpg hwy w/mine on 70hp. I am going to make a 5 hr round trip on sunday on 100hp to see if I can get up to 20. I always keep my rpms under 2k and w/my 35's I usually run no more than 1700rpm when Im driving to get decent fuel mileage. I have had 1 early 99 and my friend another, both 6 spd, both old school X-power 100hp chips, both over 20 hwy. Always seemed to me the computers in the early ones tended to get the best mpg's. I guessing you have an auto and were driving at least 75mph? Autos seem to get worse mpg's, and speed/rpms really help the mpg's.
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'03 F350 CCSB 27k
6spd,4x4floor
285/75/16 +2"front
RCD EGR Delete,AEM Intake
Sold:
'06 F350 CCSB 87K
6spd 4x4manual hubs
6"Fabtech w/35"s
'01 Stroke CCSB 112k 6spd
5" lift, 35" tires 4" straight
NAPA 6637 Intake, Wicked Wheel
TS T6 Pyro/Boost Gauges
AIH/EBPV Delete
2005 6.0, 2001 7.3, 2-'99 7.3, '97,'95,'92IDI, 3-Cummins
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Old 12-25-2009, 10:57 PM   #3 (permalink)
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Ok, but yea i have an auto in mine. So do you think I should try a
different chip or something??
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Old 12-25-2009, 11:40 PM   #4 (permalink)
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Try changing the chip settings on your hwy runs, and the stock setting. I know that some diesels seem to get better on the higher hp settings if driving it easy. Some seem to do better w/stock tuning and open air w/free exhaust. Town mpg sucks no matter what, so try your tests on the same type of hwy runs. I had a DP tuner on the same set up and it did not get me anymore mpgs then my current TS. When I bought this truck it had a Superchip and I couldnt do better than 15 on the Hwy w/it. Keep the tires hard, keep fresh fuel filter, dont hammer the auto. Do you know if you have the 3.73 gears?
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'03 F350 CCSB 27k
6spd,4x4floor
285/75/16 +2"front
RCD EGR Delete,AEM Intake
Sold:
'06 F350 CCSB 87K
6spd 4x4manual hubs
6"Fabtech w/35"s
'01 Stroke CCSB 112k 6spd
5" lift, 35" tires 4" straight
NAPA 6637 Intake, Wicked Wheel
TS T6 Pyro/Boost Gauges
AIH/EBPV Delete
2005 6.0, 2001 7.3, 2-'99 7.3, '97,'95,'92IDI, 3-Cummins
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Old 12-25-2009, 11:47 PM   #5 (permalink)
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ok, I will do that when I go back home. My truck also came with a Superchip too
and never liked it, but when I turn my chip to the 140+ setting. the truck like
almost kills, RPMS drop real low but kicks right back up. do you know why it would
do this? I fried my ECU about 4 months ago, and ever sense then it has done that.
But I'm pretty sure I got the 3.73 gears, do you know how i can check without pulling
the gears out??
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Old 12-26-2009, 12:30 AM   #6 (permalink)
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Your gears are posted on the back side of the front axle, on a white and yellow sticker. Pretty sure w/auto if you are running 65mph your rpms will be just under 2k, this would be 3.73's.(stock tires). My 140 setting has some different timing than my DP did, w/the TS seems to really lag off the line and not really 'hit" untill I'm in the turbo powerband, your auto could make it worse. My 70hp really gets it good of the line though. Maybe who ever sold you the TS could check the 140 setting and change it to make your truck run better, maybe if you can send the computer code(model) that may help. What happend to your old ECU?
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'03 F350 CCSB 27k
6spd,4x4floor
285/75/16 +2"front
RCD EGR Delete,AEM Intake
Sold:
'06 F350 CCSB 87K
6spd 4x4manual hubs
6"Fabtech w/35"s
'01 Stroke CCSB 112k 6spd
5" lift, 35" tires 4" straight
NAPA 6637 Intake, Wicked Wheel
TS T6 Pyro/Boost Gauges
AIH/EBPV Delete
2005 6.0, 2001 7.3, 2-'99 7.3, '97,'95,'92IDI, 3-Cummins
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Old 12-26-2009, 12:48 AM   #7 (permalink)
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Sweet, i will have to get back to ya on the gearing. When i have mine on the 140 it gets off the line excellent, just shift hard into 4th gear. I should be able to call up TS and ask them to change it to right? But I was driving down to see my gf and i stopped at a truck stop to get a pop. I was getting into my truck in a hurry bc it was raining and i jumped in and slipped and kicked my chip, the truck shut down immediately and wouldn't start back up. So i called the place where i got my chip to see why it did that. So i towed it back to his shop and thats when he told me i fried my ECU. And about 2 weeks and 1500 bucks later i got it back. luckily i found an ECU for my truck
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Old 12-26-2009, 01:00 AM   #8 (permalink)
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Whoever burned your chip to your old ECU probably can change it to your new one, unless you know that your new one is the same as old. That sucks about kicking this thing, Ive seem it before on here. I dont remember my DP sticking out like this TS, maybe this risk alone might be worth the switch back to DP? Can you think of a way to prevent this from happening again other than just being careful?
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'03 F350 CCSB 27k
6spd,4x4floor
285/75/16 +2"front
RCD EGR Delete,AEM Intake
Sold:
'06 F350 CCSB 87K
6spd 4x4manual hubs
6"Fabtech w/35"s
'01 Stroke CCSB 112k 6spd
5" lift, 35" tires 4" straight
NAPA 6637 Intake, Wicked Wheel
TS T6 Pyro/Boost Gauges
AIH/EBPV Delete
2005 6.0, 2001 7.3, 2-'99 7.3, '97,'95,'92IDI, 3-Cummins
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Old 12-26-2009, 12:45 PM   #9 (permalink)
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ok, but I hear ya about the TS sticking out. Thats why I'm trying to figure out if I wanna get a new chip, but I have been asking around and haven't heard of really any good chips out there for the 7.3. Have you heard anything good on the edge chips for the 7.3?
I've heard of people ducktaping the chip so it can be pulled out, but nothing about keeping it from being pushed in
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Old 12-26-2009, 12:50 PM   #10 (permalink)
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I run my TS on the 140 all the time and it is not the best for mileage....best has been 18.5 freeway (14-17 foot heavy). The best setting for my truck is the 100hp setting for mileage.
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Late 99 SD PS CC SB 4x4 Lariat. 7.3l TS 6xchip Stock-140hp , Banks 6gun, Full Banks Gauges, 4"SS turbo back exhaust, UMP Intake w/ Donaldson Filter, Auburn posi F&R 3.73, ATS Trans W/ 5Star converter and CoPilot, 18k trans cooler, Dynatrac FreeSpin front hub kit, ITP oil X over, ITP boost regulator, Aero Fuel Tanks Replacement 55 Gallon tank, New timing cover,oil pan,oil cooler, water pump,turbo petastel, reman HPOP, new fuel filter housing, slotted brakes all 4 corners W/ Ceramic pads, Adjustable trac-bar, Front 1.5" level kit only. 226,000 miles 10/1/09 Best mpg 27.3..Norm city 15 mpg hwy 20+

Early 99 CC LB 2WD Manual 6....Stock 228k (11/09) and running strong, only repairs Clutch, water pump, alternator. K&N FIPK since 36k and loving it!

2006 CC LB 4WD Lariat 6.0l 5R110 Stock 178k (12/09) "Dad's" 3 injectors and GP harness(12/09) Dynatrac Ball Joints, New ERG and 2 injectors (6/10)
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Old 12-26-2009, 06:47 PM   #11 (permalink)
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Quote:
Originally Posted by jacksonbend View Post
I get easily 18mpg hwy w/mine on 70hp. I am going to make a 5 hr round trip on sunday on 100hp to see if I can get up to 20. I always keep my rpms under 2k and w/my 35's I usually run no more than 1700rpm when Im driving to get decent fuel mileage. I have had 1 early 99 and my friend another, both 6 spd, both old school X-power 100hp chips, both over 20 hwy. Always seemed to me the computers in the early ones tended to get the best mpg's. I guessing you have an auto and were driving at least 75mph? Autos seem to get worse mpg's, and speed/rpms really help the mpg's.
Must be nice to have a 5" lift 35" tires and still get 18-20MPG...
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Old 12-26-2009, 07:12 PM   #12 (permalink)
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My friend here in Bend is running an edge evolution programmer on 02',auto,CCSB, 285/75 tires,full 4"andAFE-2. We both try to out do each other on the mpg's, he is having a hard time breaking the 16mpg's w/mixed driving. For us mixed is 70/30 hwy/town. He is running it on the high setting which I think is 100hp now and is getting the best mileage out of the programmer there. He us usually just under 16. We are running the winter blend diesel here too, so if it hurts mpg's like most say it does, he is over 16 anywhere w/o winter blend.
Does the newest DP stick out, anyone know? I dont think my old one from 07' did.
__________________
'03 F350 CCSB 27k
6spd,4x4floor
285/75/16 +2"front
RCD EGR Delete,AEM Intake
Sold:
'06 F350 CCSB 87K
6spd 4x4manual hubs
6"Fabtech w/35"s
'01 Stroke CCSB 112k 6spd
5" lift, 35" tires 4" straight
NAPA 6637 Intake, Wicked Wheel
TS T6 Pyro/Boost Gauges
AIH/EBPV Delete
2005 6.0, 2001 7.3, 2-'99 7.3, '97,'95,'92IDI, 3-Cummins
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Old 12-26-2009, 10:45 PM   #13 (permalink)
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Must be nice to have a 5" lift 35" tires and still get 18-20MPG...
i get about that as well
35s 6.5" lift 6 speed
its all in the 6 speed
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02 7.3l psd 6 spd 4x4 cc lb srw
cut muffler
afe stage 2 pro guard 7
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superchips programmer
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aic
pro comp 6.5 lift
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kmc wheels
pro comp track bars
viair 480c compressor
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Old 12-27-2009, 12:06 AM   #14 (permalink)
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Do you have an auto in your late 99? Because I have an auto in my early 99
and when it shift into 4th gear, it shifts really hard. Do you have this problem??
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Old 12-27-2009, 09:11 PM   #15 (permalink)
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Okay, just got home from a 301 mile trip to Salem and back. Filled up before I left and when I got back at same Chevron and both to same first click. Ran the TS on 100hp this time, my hubs were locked in due to snow/icy conditions for the entire trip, kept it under 65 when I could go that fast, went as slow as 20mph for about 10 miles over the pass one way. Not the best driving conditions as I was trying for fuel mileage. I used 17.297 gallons and went 301 miles = 17.4 mpg's hand calculated and adjusted for tires. So, I'm sure that would have been better w/dry roads, no 4x4 and a more consistent speed. My truck does seem to get better w/the TS on 100hp. I will keep it here for awhile and make some posts later about my TS and mpg's.
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'03 F350 CCSB 27k
6spd,4x4floor
285/75/16 +2"front
RCD EGR Delete,AEM Intake
Sold:
'06 F350 CCSB 87K
6spd 4x4manual hubs
6"Fabtech w/35"s
'01 Stroke CCSB 112k 6spd
5" lift, 35" tires 4" straight
NAPA 6637 Intake, Wicked Wheel
TS T6 Pyro/Boost Gauges
AIH/EBPV Delete
2005 6.0, 2001 7.3, 2-'99 7.3, '97,'95,'92IDI, 3-Cummins
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