Originally Posted by geraldjust (Post 3465737)

Kinda. To at least attempt to be carb compliant you not modify any emissions systems. Both evap and secondary 02 are both emissions related. so tampering with them is a automatic none compliance. adding the flex fuel sensor to do so would bring us closer to get a flex fuel allowed. Then the final step would just be if any company want to sell one with a carb number to make it official. and bam!

Originally Posted by NoHaveMSG (Post 3465740)

Got it. I was just wondering if you were actually working on a carb compliant kit or just trying not to trip anything to do with EVAP readiness.

Originally Posted by geraldjust (Post 3465541)

Hi guys! ive been trying to see if i can make a CARB compliant Open source flex fuel sensor. inputs the 50hz-150hz. currently i have something that can already output a 0-5v output analog signal. and made a board that can output to canbus too. What im thinking is something that can work but i just need someone thats familiar with coding for this. I want to make it carb compliant so we cant hijack any other inputs. what i did notice here:
https://www.ft86club.com/forums/show...t=90692&page=4
Post #51 by @ztan . That the ECU have a larger amount of IDs it can get info from then from what the car can signals actually have. Ive already reversed engineered all can bus signals. I noticed that some like hex ID 0x149 or 0x14A are not actually ever transmitted within the car.

So my thought is this: IF instead of grabbing the 16 bit ram value for the 02 or evap, could it be possible of grabbing it the exact same data but from any of the bytes that come from the mailboxes of those can id packets? So the only thing really needed is replacing the ram value (theoretically ) of the routine.

This should also theoretically make it compatible with 17+ cars since if those files also have similar ID. All we need is to inject the canbus signals and those ecus will also get it to work.

Can anyone confirm or see if im heading in the right direction. Also to be clear, the hardware is done and its open. Firmware is technically done. Can be used in analog form but i want to make it carb compliant.
@steve99 if you think this is possible i can DM you for a factory tune with just FF added to it?

Originally Posted by geraldjust (Post 3465737)

Kinda. To at least attempt to be carb compliant you not modify any emissions systems. Both evap and secondary 02 are both emissions related. so tampering with them is a automatic none compliance. adding the flex fuel sensor to do so would bring us closer to get a flex fuel allowed. Then the final step would just be if any company want to sell one with a carb number to make it official. and bam!

Originally Posted by CSG Mike (Post 3465743)

Open Source and CARB compliant are mutually exclusive.

Originally Posted by CSG Mike (Post 3465745)

This has been considered by many folks, many times, but unfortunately, the market just won't bear the cost of such a setup.

Unfortunately, getting CARB excemption is neither cheap nor fast.

Source: CSG does CARB consultation for other companies, including developing code/calibration and getting parts/vehicles through the CARB process, and has done so successfully.

PM if you want to discuss further, and I'll break down why it's likely just not really viable. :(

Originally Posted by CSG Mike (Post 3465743)

Open Source and CARB compliant are mutually exclusive.

Originally Posted by FR-S2GT86 (Post 3465858)

So what @geraldjust is trying to do, is what I was interested in doing a few pages back: wanting to find an alternate way to connect the flex-fuel ethanol content signal to the ECU so that we don't have to hijack the O2, evap pressure sensor, or MAF sensor, and so that the kit will not make the vehicle emissions non-compliant within the US. Post #93 https://www.ft86club.com/forums/show...t=94751&page=7

I believe the possibility of successfully completing this could be the BASIS for any other third party to come in and go through the proper procedures to make the kit CARB compliant.

Basically, he wants to see if he can actually get it to work properly, not really get it CARB certified at the moment.

Originally Posted by geraldjust (Post 3465872)

yup 100% trying to see if its possible in the first place. but by the looks of it i think it can be done. i know it would require a bit more on the input signal to do so as we translate it to can but i know that part can be done. Im have worked with a company in the past to get something though CARB and i know its a pain in the add and alot of money. my goal i guess is to have a proof of concept it can even be done. And if i company want to use the knowledge to make a kit. Cool i will even design their board if they want haha. This kind of thing has been done before : https://www.cobbtuning.com/nissan-gtr-can-gateway/
So im sure it can be adapted. i just would need someone who's familiar with the assembly code in this ecu to work with.

Originally Posted by FR-S2GT86 (Post 3465952)

Yeah, I am of the mindset that ANYTHING can be achieved if you invest the proper time and resources. With the help of one other member here, I solved the problem of poor audio quality in the '19-'20 86 with the Harman head units a few months back, but coding is beyond my skills. However, I am with you that this idea is plausible.

All of the current flex-fuel kits have the one downside to them that you must hijack one of the three existing sensor inputs which pretty much renders your vehicle illegal for public road use.

Are you considering using one of the existing kits which outputs a 0 to 5-volt signal, taking that signal and converting it to a signal that you're needing for your project, or are you starting out with a completely different signal altogether?

Originally Posted by geraldjust (Post 3466086)

Exactly. And oh no, i already made a board that inputs a traditional 50-150hz and out put a 0-5v signal. i can program it to .5-4.5v all that is easy. i even made it to output via CANBUS. So i can set whatever id , or format the data however i want. 8 bit wide or 16 bit. etc... its unlimitedly configurable. i even reversed engineered the whole can network. Because of this i know their are some IDs that the roms still read into ram, BUT the ecus dont do anything with them. and in the current cars, those ID are not used. so this means if the rom if programmed properly it can be done.
My theory is that originally how this thread looks like they read the ram value . but instead of doing so from the evap / o2 16bit data. I can just point the ram value to whatever ID/data byte we want.

EDIT: so yes it can do the traditional 0-5. but that will be more to diagnose. But my goal is to still have it canbus enabled.

Originally Posted by FR-S2GT86 (Post 3465858)

So what @geraldjust is trying to do, is what I was interested in doing a few pages back: wanting to find an alternate way to connect the flex-fuel ethanol content signal to the ECU so that we don't have to hijack the O2, evap pressure sensor, or MAF sensor, and so that the kit will not make the vehicle emissions non-compliant within the US. Post #93 https://www.ft86club.com/forums/show...t=94751&page=7

I believe the possibility of successfully completing this could be the BASIS for any other third party to come in and go through the proper procedures to make the kit CARB compliant.

Basically, he wants to see if he can actually get it to work properly, not really get it CARB certified at the moment.

Originally Posted by Jaden (Post 3467811)

It's unbelievably ridiculous that making your car burn cleaner makes it non-compliant.

The whole country needs to go to sniffer test only... Commufornia is absolutely pathetic in its attempt at totalitarian control.

Jaden