💬 How to Flex Fuel | TECHNICALLY SPEAKING 

WARNING: Hardcore Tech Content Ahead! In this video we are taking a closer look at Flex Fuel sensors. Topics covered are: what flex fuel sensors are, how they work, when you might need one and how to install and set one up on a Haltech ECU. The first part of the video covers the basics of Flex Fuel and its application, the second part includes a Step-by-Step Guide for setting up a Flex Fuel Sensor in the Haltech ESP software. Enjoy!

It's so epic to see an Aussie company right up there in terms of expertise & knowledge. Yeah lads!

Hardcore tech indeed! But, it's so good of you guys to put this out there!

Awesome video. Easy to understand even for an amateur like myself!

ooh yeah gimme that high-octane corn syrup... great vid as always, detailed but clear and easy to follow

Thanks Matt, Very in depth video, Keep em comin!!

Nice explanation......I'll get one for my Tesla

I love Matt's videos.

Nice to see this series again :)

Top work mate, gotta get me an elite oneday

Good information, I'm getting my build ready and attempting to get the elite functions and wiring organized and didn't realize the ethanol sensor also had temperature. I just corrected that and no doubt will have many other details to correct. Good thing the pins are simple to swap on the connectors.

Another great video to learn from, Thanks Matt

don't forget to enable the pullup! this had me for a couple of days...

Love This, Keep these up Haltech

Another awesome video... I'm trying to learn more about flexi fuel....get my Brumby back next week running on corn juice.... Absolutely no regrets going with haltech...💪🌽👍

Great explanation

Nicely explained Ethanol side of the Flex.. But what about the temperature side of adjustments?

Much Obliged Sir.

I'm having some issues with what I believe are cause by change in fuel temp. I recently moved from Okinawa Japan to the far north in Aomori Japan and the temps are greatly cooler, but on the same elevation. I have noticed that my average AFR is quite a bit richer on average. I purchased a flex fuel sensor to take advantage of the temp sensor corrections built in. I was wonder if you have any educational info on the effects of fuel temp on fueling? Or, if you have any other thoughts as to why im seeing this issue.

Question: Can it be used as a preemptive measure against poor fuel (rich on ethanol instead of gasoline)? Simply to be there, to on-the-go analyze and alter fuel mixture, without actually retuning it manually?

Can I run a flex fuel sensor with the platinum gm sport?

I only have a PS500, a NA car, regular pump fuel. But geez i luv this stuff. i don't understand all of it. But it just makes me want an Elite 750 on E85...Why???? possibilities.

Fuel Composition tables being activated on Elite's is likely a common issue because your help file and the quick description window on the bottom left of the screen lead you into 2 different directions.. It confused me as well ( i came from a Pro Plug N Play ecu) so i figured it was the same.

I’m stock on a Camaro ss 2014 do i need the kit or just the sensor?

So do u need to re tune when u change fuels etc what if it was tuned for e85 then used a 3rd of the tank an put 98 will it pick an adjust itself or will it need to be tuned again ?

soo can you run a 2 stroke (be it pre mixed or letting the engine mix) run on e85? and still have benefits?

I really appreciate this brief introduction to the Haltech software. I have a question after watching this video: Does the Elite (and/or other Haltech controllers) monitor and compensate for knock? If your website has this info, please provide a link. Thank you.

Hello on the HT-051100 ecu Platinum Sport Plug-in GM, if I want to put the flex fuel there is the "signal" output on the ecu? thank you

Can Cobb ethanol sensor be used on Haltech elite 2500?

Is there any change in HP when your getting 83.3% pump E85 vs 75.2% pump E85. ???

My 2011 Jeep does not seem to have that sensor. Does it use the oxygen sensors to detect the ethanol %? E85 seems to have 105 octane around here to. Need the change the ignition timing too??

Can you please do power gain on a NA motor with e85. Also can you talk about e85 using 95 and ethanol as well as 102 and ethanol if that makes any difference. For example making your e85 using 15% race fuel and pure ethanol vs 85 using pump fuel and pure ethanol please

So if I wanted to go flex fuel on my g37 I could buy that haltech flex fuel sensor and if I upgrade my fuel injectors and fuel pump and ignition coils I should be able to run e85 and 91 no problem?

And if you do not run a fuel return line, is the flex fuel sensor ok in the fuel delivery line?

Hey guys. Currently doing a reasonably decent fuel setup on my rb26 tied in with you’re elite 2500. I use the car for some spirited road driving on the occasional weekend tied in with some track work. my initial plan was to run a flex setup, however after talking to a couple of workshops and doing some research im feeling slightly hesitant due the fact ethanol is quite hydroscopic and the sensor actually measures density rather than ethanol content itself. ( please correct me if I’m wrong here) thus meaning any water found in the fuel will inturn register as a very high ethanol content, ecu adjusts parametres to suit etc etc ends up being a crazy rich fuel map with worst case washed bores. Obviously the whole idea of the sensor is to have the convenience, so buying drums of it for the consistency and peace of mind would work but it completely defeats the purpose of it being able to fill at ya local servo. Not to mention drums are stupid expensive. Obviously having this luxury of multiple fuels is great for daily/weekend work but my mechanical mind sais the risk is just not worth it. What still leaves me scratching my head is to how a fair few people run flex and dont seem to have problems with them. Is this because they arnt being driven hard enough to cause damage? ( doubt it ) I can only see a few options for myself here: 1: dedicated e85, and carry jerrys in the boot for decent drives 😞 2: run the flex fuel setup and keep a ethanol testing kit and check the content before filling at the servo. 3: dedicated 98 it’s convenient but gay 😂 4: a seperate map for each fuel, run the tank almost empty, fill up full and stay off wot for a bit to flush the lines and filters and don’t forget to change maps when u do fill up. 5: I do have an aem wideband fitted, am I able to intergrate that into the elite and setup engine protection thresholds via afr’s to alleviate a bad batch of fuel if it does get a drink of water? I feel this is probably the simplest option. Am i totally missing something obvious here?? Cheers lads, love the vids, keep em coming 👍👌

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Is isopropyl alcohol less corrosive than ethanol, and does it eat away at fuel pump housing plastics like ethanol?

Awesome video, could e10/91 octane with some small amount of ethanol be affecting my gasoline tune?

What happens if you mount the sensor before the fuel pressure regulator?

Can u run the flex fuel sensor somewhere in the fuel line for a more accurate reading to the ecu???? @Haltech

Where can I get the hardware

Are these setup instructions the same while using a GM flex fuel sensor other than a Haltech sensor

So I can put 93 octane and then if I wanted to I can put e85

What would happen if you had a 'dead head ' fuel system where the pump, filter, regulator, Flex Fuel sensor and return line were all at the tank and there is no return line from the engine. If you had a near empty tank of petrol and you then filled up with E85, on start up the fresh fill of E85 would be detected but there would still be straight petrol in the fuel lines right up to the fuel rail, would this cause a problem ?

Would this read the octane number of the gasoline? 91, 95, and 98 or any mixture in between.

FYI in Australia ethanol is made from sugar cane not corn and all of it is refined by Manildra Co so if you by e85 from Mobil or e10 at BP the ethanol is brought from Manildra Co

Can a Flex Fuel Sensor be used for Gasoline to show the Quality of Gasoline in the tank Like In a Situation where The Car runs solely on Gasoline.

How to get this tune from haltech

Is there a way I can display Ethanol % on my IC7? I am running the unit as a standalone mode. I have wired all the free leads, I purchased oil, fuel and temperature sensors. I am really happy with it but my ecu and ic7 are not compatible yet.

ok how can I re program my engine at home and install a flexfuel box? Where can I get this software ?

<a href="#" class="seekto" data-time="371">6:11</a> testy pop haha

YAY!! 999 likes. I tipped it over to 1K... I feel so special.

Why is Flex fuel sensor installed in the return line??

What is the difference between the Haltech sensor VS the GM Censor ? My guess is the Haltech would have more flexability ????

Why is it these sensors are always put on the return line? Wouldn't it make more sense for it to be on feed side to read the parentage going into the motor?

Why isn't the sensor installed in the fuel supply line instead of the return? Is there a reason why it shouldn't be?

So you can do it to any car

666 like! Let's raise some hell-tech

Last Time I looked at e85 and how it's made it's far more costly to produce it then petroleum, vehicles I've owned flex fuel,ran like crap on e85,and got substantialy less m.p.g.besides the fact I had to drive 20 miles to the only known gas station

What's wrong with the buttons on his shirt, causing weird creases is it done up in the wrong hole, big weekend mate

When does the new ECU come out? The Elite is becoming old technology.

Not made from Corn in Australia

How to maintain and clean a Flex-Fuel sensor? What's the output values of the sensors 12v input and why? How to assure the sensors ethanol values are correct? How to calibrate the sensors values? Why do you guys sound like that?

Don't you mean petroleum based fuels or r you just saying gasoline to keep the American's happy

Music is annoying

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