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9th gen Si Flex Fuel Glitch

Posted: Thu Apr 19, 2018 1:34 am
by Hyudryu
I've read the help file on Ethanol parameters, and I can't seem to figure out how to get it to work. I enabled live tuning for the Ethanol fuel compensation box and flashed it onto my ECU. I'm currently tuned for E60 gas, and I put in E70. My fuel trims are roughly 7% on idle, and it goes upwards of 15-20% (lean) which is expected due to the increase in ethanol content. I tried adjusting the ethanol fuel compensation and it doesn't seem to be affecting the fuel trims at all. I even tried increasing the 70% ethanol column and still it was running lean, even after increasing it to 80% from 10% lol. Am I doing something wrong here? Even with so much fuel compensation, it's still running lean. Seems like the table isn't affecting the fueling at all
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Re: 9th gen Si Flex Fuel Glitch

Posted: Thu Apr 19, 2018 10:26 am
by Spunkster
Do you have a flex fuel sensor and controller installed and wired into the ECU?

Re: 9th gen Si Flex Fuel Glitch

Posted: Thu Apr 19, 2018 3:29 pm
by Hyudryu
Yes I do, and it's reading the proper ethanol percentage on my live datalog. Went from 60% up to 70% so I know it's working. It's slightly higher than what's shown on my gauge, but it's consistent (like 2% off)

Re: 9th gen Si Flex Fuel Glitch

Posted: Mon Apr 23, 2018 9:13 am
by Spunkster
Can you post the calibration and a datalog showing the issue?

Re: 9th gen Si Flex Fuel Glitch

Posted: Tue Apr 24, 2018 6:45 pm
by Hyudryu
I'm not going to post my tuner's tune/datalogs publicly, but I recorded a video to demonstrate what I mean by it's not working at all. I don't know if I'm doing something wrong, or if the feature is bugged but if I increase the fuel compensation, the fuel trims should theoretically go richer by the same amount right?

I also tried setting the percentage to 20%, saving the calibration, and flashing it the old fashion way (to rule out live tuning being glitched) and the results are the same. Fuel trims are also close to 0 while driving. If I do put in E85, Hondata flashpro will not compensate for that and I will be running lean even if I set the values on the ethanol column.


https://www.youtube.com/watch?v=fBWZPVmLYAI

Re: 9th gen Si Flex Fuel Glitch

Posted: Tue Apr 24, 2018 8:55 pm
by Jun43
Hyudryu wrote:
Tue Apr 24, 2018 6:45 pm
I'm not going to post my tuner's tune/datalogs publicly, but I recorded a video to demonstrate what I mean by it's not working at all. I don't know if I'm doing something wrong, or if the feature is bugged but if I increase the fuel compensation, the fuel trims should theoretically go richer by the same amount right?

I also tried setting the percentage to 20%, saving the calibration, and flashing it the old fashion way (to rule out live tuning being glitched) and the results are the same. Fuel trims are also close to 0 while driving. If I do put in E85, Hondata flashpro will not compensate for that and I will be running lean even if I set the values on the ethanol column.


https://www.youtube.com/watch?v=fBWZPVmLYAI
you can email their support...

Re: 9th gen Si Flex Fuel Glitch

Posted: Tue Apr 24, 2018 11:26 pm
by Hyudryu
Okay sorry for posting an issue on the forums and seeing if anyone has experienced this issue. I'll email their support from now on

Re: 9th gen Si Flex Fuel Glitch

Posted: Thu Mar 28, 2019 12:18 pm
by chambers805
Any update on this? I have a 14-15 Civic Si Coupe with the ethanol sensor wired into ECT2.

Re: 9th gen Si Flex Fuel Glitch

Posted: Fri Mar 29, 2019 9:49 am
by Spunkster
What version of software are you using?

Re: 9th gen Si Flex Fuel Glitch

Posted: Sun Mar 31, 2019 8:47 am
by chambers805
version 3.1.8.0, I haven't tried the beta yet, was waiting to hear of an update in the change log before i hit up my tuner. Don't want 2 separate tunes just for e85.

Re: 9th gen Si Flex Fuel Glitch

Posted: Mon Apr 01, 2019 9:40 am
by Spunkster
You need to use the most recent beta version to see if that solves the issue for you

Re: 9th gen Si Flex Fuel Glitch

Posted: Tue Apr 16, 2019 6:58 pm
by chambers805
Nope still doesn't work, big waste of time. :/ any ETA?

Re: 9th gen Si Flex Fuel Glitch

Posted: Wed Apr 17, 2019 9:04 am
by Spunkster
You need to post the calibration as well as a Datalog showing the issue.

Re: 9th gen Si Flex Fuel Glitch

Posted: Wed Apr 17, 2019 9:08 am
by Hondata
If you're still running that ethanol fuel trim table in the first post then it will not work. The fuel trim values should be very close to half the ethanol content. eg at 40% ethanol I'd expect a 20% trim.