What MPG gain can be expected from a tune?

jwth said:

I am running a custom tune on a 5.3 4x4 Yukon and run at 24 mpg more or less on the highway. It does drop to 22 when running in AWD in the winter.
Good from 45 mph up to 80 mph.
I have been running it for 1 1/2 years so it is no fluke.
No I did not buy the tune. It is a private one.

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You've been on here almost 5 years, and your only post is to claim that you have figured out how to get about 3-5mpg better than any other tuner can get with no proof or other information at all then to say you did it....???.....???....??? You do realize this … stinks.

Even the NNBS with its management doesn't do that well (tuned or not).

Watching is not a crime
If you have a problem with someone doing the digging and discovery you have my pitty.
Buy a tuning rig and startto do your own without crying and bashing.
Yes I have a private tune that I worked on for several months.
Yes it is not a fluke.
Yes I did share with a friend in his 2004 Suburban 5.3 4x4 to see it worked on more than mine.
YES IT DOES GET 24 MPG.
Put the work into it instead of being upset that someone else did.

I have been here 5 years and watch the posts. I CHOOSE not to join in the ***** and gimme sessions.

Now
Go to hptuners site and look up the calibrations that have been posted for 2003 gmc yukon and if you are able to understand what you are seeing you will find one that was posted without a signature couple of years ago. That is tha rough draft AND IT PULLED 26 MPG with some minor problems and could not be used for any towing. And no it has not damaged the engine.

I have no more comment on this

You get out of it what you put in

I will continue driving mine with a smile

adriver said:

You've been on here almost 5 years, and your only post is to claim that you have figured out how to get about 3-5mpg better than any other tuner can get with no proof or other information at all then to say you did it....???.....???....??? You do realize this … stinks.

Even the NNBS with its management doesn't do that well (tuned or not).

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The XL already has e-fans and I drive fairly easy on it. Don't do any regular towing but I can't rule out the occasional local tow.

I know the 4.10 gears hurt me a bit and they scared me a little when I bought it for this reason. I did a lot of reading and most said what the 4.10's lose on highway driving will be made up with local driving (not having to downshift on hills, TCC staying locked up at lower speeds etc). I'm not sure I've really seen that. The best mileage I've seen was 19... right after I bought it I drove it home on a state highway (no faster than 63 or so) for just over 100 miles. I was trying to see what the max mpg I could get was. I've never seen numbers that high since then... mostly because we are either doing local driving, or interstate driving.

As far as a gear swap: probably not worth it there. We're talking about a couple thousand to do front & rear, plus re-tune PCM for the gear-change which would be hard to recover. I'm also hesitant because it's our family car so it's not practical to have it down for a while and it takes me a while to do that type of work. No local shops can reliably turn around a vehicle quickly (IE, the local transmission shop told me they would have a car done by the end of November; after weekly calling them I finally got it back in April. And that's the ONLY reputable transmission shop around). Not to mention, I just rebuilt the rear-end (all bearings and seals).

jasonc said:

Get a flex fuel emulator to start http://www.pointaengineering.com/Fl...for-GM-GMC-Products-CLICK-FOR-INFO-000001.htm unless you plan on running E85. This is suppose to improve MPG's and sometimes a rough or weird iddle

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Do you have personal experience with that? Seems the only improvements would be related to correcting problems that exist only on some vehicles experiencing sensor problems. Furthermore, reading through the testimonials only 1 of them made claim to improved gas mileage.

jwth said:

Watching is not a crime
If you have a problem with someone doing the digging and discovery you have my pitty.
Buy a tuning rig and startto do your own without crying and bashing.
Yes I have a private tune that I worked on for several months.
Yes it is not a fluke.
Yes I did share with a friend in his 2004 Suburban 5.3 4x4 to see it worked on more than mine.
YES IT DOES GET 24 MPG.
Put the work into it instead of being upset that someone else did.

I have been here 5 years and watch the posts. I CHOOSE not to join in the ***** and gimme sessions.

Now
Go to hptuners site and look up the calibrations that have been posted for 2003 gmc yukon and if you are able to understand what you are seeing you will find one that was posted without a signature couple of years ago. That is tha rough draft AND IT PULLED 26 MPG with some minor problems and could not be used for any towing. And no it has not damaged the engine.

I have no more comment on this

You get out of it what you put in

I will continue driving mine with a smile

Click to expand...

Crying, bashing, getting upset? No to all, stick to the truth, and you won't have to argue like a child. Your reason for not posting is because you didn't want to get into any ***** or gimme sessions, but then you post THAT? I see why you didn't post for five years. I don't need to continue with you, I already know everything I need to.


P.S. You know what I call a "gimme session"? Lurking on a forum for five years and NEVER contributing anything. Then when you do post, its only to say you COULD help, but you don't. Then only out of spite do you say to go search somewhere else.

You do cry and whine alot
Maybe you should look elsewhere

CountryBoy19 said:

Do you have personal experience with that? Seems the only improvements would be related to correcting problems that exist only on some vehicles experiencing sensor problems. Furthermore, reading through the testimonials only 1 of them made claim to improved gas mileage.

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Not yet but i plan on buying one just to correct the rough running sometimes my hoe seems like it runs like shit sometimes and them 10 min later runs fine also my fuel mileage is never the same and i take the same 3 hr trip to work every 2 weeks. So i will update as soon as i purchace

open in 7 zip
I have a longer vid but I cannot upload it here
This is for the nonbelievers
Lambda is great for performance and stuck mindsets
I want max economy and have it

buy a calibration editor and start, you too can learn.
the only fish i smell are the carp