BASIC Fuel Economy Tuning Using HP Tuners ~ Step by Step | Gears and Tech 

Can you teach us ? 👍🏼🙏🏼

I see alot of tuning where stoich is changed ! Changed to match the regulated 10% E85 added to unleaded fuels is 1 reason for the change. Agree about using the wideband !

So what did you change? I’m very curious

​@@NtulkSlzX I did everything he did but just a little bit more

doing that's actually going to cause more fuel usage than keep it locked up. While your foot is off the throttle the throttle body closes completely, during which fuel is cutoff. Your engine is staying at higher rpm because it's connected to the wheels, not because it's actually running. Now that you've made it idle while cruising you're just going to be burning fuel the entire time, as well as lost ALL engine braking thus putting more strain on your actual brakes.

excellent gains

What tuning device did you use?

Thanks for stopping by. All true points. You know your stuff

Thanks for sharing.

Yes, you're correct. I may not have explained that well, but we are saying the same thing. Im just saying to adjust the stoich setting in that table in case your truck thinks there is ethanal in the fuel and starts referencing that table

@@GearsAndTech i must be watching something else, also that table as well as hp tuners as a whole program wont let you run lean unless you cheat the numbers. also running a leaner mix wont get you mpg an efficeint tune will, or if you go waaaaaaaay lean and tune like a diesel with the throttle open and control speed with fuel to eliminate pumpng losses

Doing what I show in the video has net me a minimum of 2l/100 km improvement in fuel economy. It's not a night and day difference, but it makes a difference at the pumps In all honesty, the biggest factor is that rich lean switch over map on the 02 sensors. Thats what's really leaning out the fuel. Since I leave all safety systems in place the truck will end up with a different tune than what I set in the tables for sure. But telling it to go onto the lean side for afr tells it what Im after, and it listens. I also realize I am leaving a lot on the table by not messing with the other maps. But, this video isn't showing advanced tuning. Im showing the quick and dirty.

@@GearsAndTech We'll need ironclad evidence of that... Some of your edits quite literally work against fuel economy.

Unfortunately my video editor isn't really knowledgeable in these sort of things so he edited out a lot of what I was doing The good news is that I have purchased a new avalanche and will be Doing a fuel saver tune on this one. Since its an 08 I figured I would do a video on it since its slightly different. Im curious to know which changes you feel are opposite of fuel saving changes

I think I went over all that. Been a while since I watched this myself

@@GearsAndTech I thought so, just making sure no one would make the same mistake I would.

For sure spending more time dialing in settings is always the best way to go However, there is nothing unsafe about the tune. This is the quick and dirty that stays well in the safe side without needing a lot of testing time to get it right.

@@GearsAndTech if it works it works.

Does your rig still run? Any update? Did you really save some gas with this tune?

I've been running this tune on Chevys for the past 13 years. It saves me about 2 liters per 100km on average.

@@GearsAndTech ok so in us..... it saves you 1/2 of 1 gallon of fuel in 60 or so miles? thats terrible and not worth it. Am i wrong? 2 LITERS?

I hear what you're saying, but if this didn't work the way I say it does how do you explain the results in getting? I think you need to go and try it then come back and tell me I'm wrong. Just because you never heard this before doesn't make me wrong

⁠​⁠@@GearsAndTechthis 100% is incorrect. Adjusting Stoich doesn’t work the way you are explaining. This isn’t you being innovative, this is you being very misinformed and dangerously misinforming others. When you lie to the ECM about Stoich, your ECM is being told a lie about fuel density hince why you are seeing an mpg change on the dash. This is one of the most misinforming videos I have ever come across and I have NEVER posted a negative comment on another creator’s video ever. Please delete this video. Sincerely, a 17 year Professional GM Calibrator and a former Bosch Calibration Engineer.

It's to adjust the swap over point so it stays on the lean side

Should work great in your suburban

@@GearsAndTech i got a check engine light :(

@@GearsAndTech I got a P0171 system too lean bank 1 and P0174 system too lean bank 2

Yes you're correct. But it pulls from that table even if its not sensing alcohol

I really hope this video is a joke. I’m Seriously cringing watching this video. I tune cars everyday for a living and everything single thing you have done on this video is completely wrong. I feel bad for anyone who has taken any of your videos advice what so ever. They key to getting better gas mileage is max break torque. While cruising at specific speeds and rpm’s you can adjust timing to create more torque. Torque moves the vehicles. Anyways I would delete this video ..

@@daftdrifting I got a 2005 Impala with a 3.5 V6. I also have HP tuners. What should I adjust to get better gas mileage at highway speed like 65-75mph. I heard Lean burn or something

@@daftdrifting i honestly feel a little bit mad. imagine some poor fella doing this to his daily driver and just melting down his new engine. it cost so much more than fuel savings. this guys a pos for doing this.

​@@dreece2000 You're not going to melt your engine running an AFR of 16 lmfao

Highway gear ratio?

with 0.9V on the rich side and 0.1V on the lean side

Yes, that's why you want it to trigger lower than .5v. That's why we set the threshold at 325 ish. It keeps it bouncing off the lean end of things

@@GearsAndTech great job, thanks

Plus and minus on my keyboard.

Stoich table is a quick and dirty way to get the result I'm after

Probbaly right. There is a lot still left on the table here

You can get some great mileage out of them. Depends how close you're willing to go to the limit on it.

Downstream o2 sensors do nothing for fueling, unless your cats are overheating

Great question. I'm not sure about that one. I've never tried myself

Yes, I advanced the spark a couple degrees

Thats right

Some computers let you play around more than others, thats why there sre aftermarket ones, but anyone can tune a vehicle, if you're willing to learn and make a risk that you mess something up, that goes for just about anything really

I can't say I have ever tried What is the use case for this? When you step on gas there would be a delay for engagement which would be very hard on the transmission

You could reduce idle speed in Neutral with the vehicle stopped rather than the stop/start trend with all of its problems. When you lift your foot off the brake, the AT would revert to D & increase idle speed.

Yes. Most of these settings are available on the 4l80e. They may not be called, but they will be in there somewhere

@@GearsAndTech great thanks, do you know if I can use similar numbers to what you used?

Yes. A lto of times it's just trial and error. I've done it enough times I know the general numbers I want. But as long as you have the software, try my numbers and adjust more or less as needed.

The 02 sensors are reading milli volts. I've never seen a system that reads anything else.

computers and laptop specifications and accessories are universal globally and there is no issue of difference or compatibility,why this trend is not being followed by car industries....

Excellent question. In the summer when I'm not running the car a lot to warm it up I'm getting mixed economy of 14.6 or so When I do just highway I'm in the 12 l/100 range If I didn't have the 4.10 rear end I could have gotten it lower. But it is what it is

it works great for fuel economy. there are other ways to dial it in, but this helps a lot

There is a lot wrong here, tbh. I could see the changes to the O2 sensor voltage tables making a difference, but it's a band-aid at best. The real MPG gains would come from dialing the LTFTs using MAF and VE tuning and driving it gently. The fact he was getting spark knock / spark retard during his highway pull is proof the engine is too lean... you should NEVER get any knock on a healthy engine. Him claiming that it's normal at 23:59 is flat wrong.

We really aren't running it that lean. But I have never had a problem with this tune

Don’t listen to this clown, trust me when I say he doesn’t know wtf he talking about😂

It won't show the savings. But if you check what it was prior, and what it is after then you can figure it out

No, one wideband is enough in that case

@@GearsAndTech can the same settings apply to e85. Does this model suv have 2 fuel mapping for e85 and or gasoline? Or is it based on gasoline?

By the way it doesnt have cats

@@kkc1577 fuel type changes the targeted/safe stoichiometric numbers.. compression ratio, engine design, octane rating, boosted or spray, and/or fuel type changes the target ratio. he should have mentioned it because many places as well as vehicles have and require differing octane versions of "gasoline"... with all the ethanol mixes out there now which is currently being increased calls for yet more adjustments which is why so many are complaining about mileage and power loses from the currently dispensed fuels. I was watching more to see if someone was going to mention that vehicles are factory tuned to waste fuel in order to feed fuel to the catalytic convertors that is how they work, they react with the additional fuel and cook off some of the bads (emissions) in order to pass tests. If you detune the fuel system your taking away that fuel so it might be perfect for use and get good economy but fail emissions testing. Him being a canookistanian i bet he had some issues with safety/emissions tests.

We don't do emissions testing at all In fact, we can cut our cats right out and straight pipe them and be fine. I could have mentioned that in my video but didn't Also, I run my tune on 87 all day with no issue. Put 91 in and it just wastes money but doesn't run any different I can even run 85 at most altitudes with no issue. I had one time where I noticed slight knock as I went over some passes in Montana to idaho. On next fill up I put 87 in and was fine again.

in my case with very mild tune as shown here I get about 2L/100 km. Its not a lot, but its pretty good

Fuel economy and emissions work opposite each other. If you get great fuel economy your emissions will be bad If you get great emissions your fuel economy will be bad

@@GearsAndTech interesting. I thought it would be the opposite. 🤔

Cars run on the rich side because it keeps nox levels lower out the tail pipe

@@GearsAndTech interesting. 🤔

If you want a little more food for thought The entire displacement on demand features added to the big v8’s has nothing to do with fuel economy and everything to do with a loophole on the emissions standards. Smaller engines are allowed to polute MORE per liter (or cc) of engine size than a bigger engine For example: Two 2 liter engines are allowed to produce more emissions than one 4 litre engine So, if you can make the epa think that your 4l engine is actually a 2 liter engine because it shuts half the cylinders off while cruising (the actual time the tail pipe emissions are tested) then you can polute more than if you didn't have DOD it gets very convoluted, but that's what the root of it all is.

It's in the transmission tab of your tune.

@@GearsAndTech my is 5th gen 2016 I don't can't find it no where

Ah. Yes on your year the tcm freaks out if you mess with throttle position anyway. Probbaly should just leave that part alone, or if you can find it do just a slight modification to it

@@faridgadimov5955 Banks, has a pedal monster deal for you im sure it does exactly what your wanting to do.

@@masterdebater8757 I don't know what banks is bro

I'm pretty sure I did tell you guys

SU

It's 1000 meters

At wot, it goes open loop. What else was wrong with the video according to you?

Yes. If you're not sure what you're doing then just leave it alone

This guy telling you to leave it alone if you don’t know what your doing but is making videos on how to save fuel .. he has no idea what he’s doing . I’m seriously cringing during this whole video

@@daftdrifting you do economy email tunes on escalades? 07

This is exactly how I start my time for fuel savings and it always gets the results I'm after.

Lots saying the same, without explaining! So why comment in the first place?

Appreciate the feedback This is quick and dirty and works. Obviously a shop is going to do more in depth tuning and testing. There is tons left of the table here

No, I was showing you guys what I do. I know what the improvement is. I've done in on a bunch of Chevy like this

You said you had a long week of driving and that would give you a chance to do a good comparison. You did indeed say that "it should improve". Sorry but I've seen plenty of "how to" videos that didn't end the way the poster intended.

I'm sorry you feel that way But thanks for giving it an honest chance. And for commenting

Haven't blown a single one

I thought I explained it in the video, but a fuel economy tune and a power tune actually can reside on the same tune. Your gas pedal controls the amount of economy or power you want. With this tune I save roughly 2L/100km. I am pretty sure I showed the before and after as well. No reason for the fuel economy tune to not add a little fun as well.

Also the table you’re editing is the Stoich AFR by Ethanol %, it’s not when “your plugs start running bad, injectors fouled up, haven’t changed coil packs, old oil” 😂

Explain!

Thanks. You're probbaly right

Over 15 years doing it like this. So far no issues.

Care to elaborate?

It happens every time someone sees something new or contrary to what they 'know' I've been in the tuning game for over 20 years. I've been in the mechanics game for more than 25. Ewalt may do things differently, but different doesn't mean it's wrong. It's just different. You can't argue with my results. And I haven't blown up any engines in the process.

@@GearsAndTech Isn't it interesting how NONE of the people claiming it's all wrong don't have a video of how THEY think is the best way to do it on their channel? Ever wonder why that is? I sure don't. ;)

@@GearsAndTech Sorry, but I really doubt your tuning and mechanical expertise. I'm not usually the smartest guy in the room, but I can still explain how a stoich table works. And to excuse WOT knock retard just shows you don't understand just how lean you made it... it's so lean the PE can't even keep it from rattling. Good luck, I hope it keeps running for you.