Hondata

Hi everyone,

I purchased a 2015 Civic SI with a Kraftwerks supercharger 1300cc injectors, 400 fuel pump and a bunch of other mods.

It originally came with a 93 tune that worked fine, but then I realized that the car had a flex fuel system as well so i took it to some guy to give it a Flex Fuel tune.

He returned the car to me with a full tank of 85 and it ran very well. When it had one bar of fuel left, I filled it with 93, and the gauge read about 23% ethanol. The car hesitated to start and the fumes were just unbearable, I nearly passed out. I managed to get it down to 17% when it was at half a tank. Same issue.

Do you know if the tuner might of missed something when the vehicle was above 10% and below 70% reading?

I do know that he did runs on 93 and runs on 85 only. Not sure if he took into account different mixtures. How can I figure out how to fix this issue and get the car driveable (its my daily). I cannot drive it with how bad the fumes are.

Thank you so much for your time!

PMd ED but realized I couldn't attach files. Please see my attached calibration.

Thank you!!

Hi everyone,

I purchased a 2015 Civic SI with a Kraftwerks supercharger 1300cc injectors, 400 fuel pump and a bunch of other mods.

It originally came with a 93 tune that worked fine, but then I realized that the car had a flex fuel system as well so i took it to some guy to give it a Flex Fuel tune.

He returned the car to me with a full tank of 85 and it ran very well. When it had one bar of fuel left, I filled it with 93, and the gauge read about 23% ethanol. The car hesitated to start and the fumes were just unbearable, I nearly passed out. I managed to get it down to 17% when it was at half a tank. Same issue.

Do you know if the tuner might of missed something when the vehicle was above 10% and below 70% reading?

I do know that he did runs on 93 and runs on 85 only. Not sure if he took into account different mixtures. How can I figure out how to fix this issue and get the car driveable (its my daily). I cannot drive it with how bad the fumes are.

Thank you so much for your time!

PMd ED but realized I couldn't attach files. Please see my attached calibration.

Thank you!!

datalog attached

Thanks!

It looks like the cranking compensation table for ethanol was not populated.


- Ed

Hey Ed, by any chance will you be able to help me get 93 basemap for the car?

9thgentwincharge wrote: Sat Dec 20, 2025 3:22 pm datalog attached

Thanks!

I am not real familiar with tuning on that 9th-gen platform but I'm wondering why there is a 15% overall fuel trim added in the Fuel settings of the calibration that you've uploaded. Generally that should be set to zero on a flex tune *if you have everything else properly calibrated*. So zeroing it out without fixing the other problems is not my recommendation here - just something that caught my eye. It seems that there also appears to be a fair bit of error in your lambda (vs command), like your fuel tables are possibly off.

Do you have any logfiles from when it had the E85 in it?

9thgentwincharge wrote: Tue Mar 24, 2026 7:16 am Hey Ed, by any chance will you be able to help me get 93 basemap for the car?

I was under the impression that it was running on 93 already. Did you change to a different calibration?

-Ed

jeffx wrote: Tue Mar 24, 2026 2:13 pm

9thgentwincharge wrote: Sat Dec 20, 2025 3:22 pm datalog attached

Thanks!

I am not real familiar with tuning on that 9th-gen platform but I'm wondering why there is a 15% overall fuel trim added in the Fuel settings of the calibration that you've uploaded. Generally that should be set to zero on a flex tune *if you have everything else properly calibrated*. So zeroing it out without fixing the other problems is not my recommendation here - just something that caught my eye. It seems that there also appears to be a fair bit of error in your lambda (vs command), like your fuel tables are possibly off.

Do you have any logfiles from when it had the E85 in it?

Thank you for the feedback, the tuner sort of ignores me or just heavily busy. I'm pretty much on my own trying to figure this out without having to drive 2 hours for another tune.

1. It feels slower compared to when I was on a 93 tune, (claims that the power is maxed out)
2. Takes alot longer to pickup boost/power (before on just 93 it was instant power to the wheel throttle felt more responsive)
3. He claimed that a flex fuel tune is never going to be "accurate" or good. Then why would anyone put a fuel system on there that makes it E capable. (I assumed that he barely does flex tunes)

I'll drop a datalog in the morning while I drive to work. It's on the last few drops of E, trying to burn it before I go back to 93.

CalibratEd wrote: Tue Mar 24, 2026 2:15 pm

9thgentwincharge wrote: Tue Mar 24, 2026 7:16 am Hey Ed, by any chance will you be able to help me get 93 basemap for the car?

I was under the impression that it was running on 93 already. Did you change to a different calibration?

-Ed

Sorry man just so much going on but I bought the car with a 93 tune, lost that file, sadly. Got a new flex fuel tune and car never felt the same as to when I bought it.

jeffx wrote: Tue Mar 24, 2026 2:13 pm

9thgentwincharge wrote: Sat Dec 20, 2025 3:22 pm datalog attached

Thanks!

I am not real familiar with tuning on that 9th-gen platform but I'm wondering why there is a 15% overall fuel trim added in the Fuel settings of the calibration that you've uploaded. Generally that should be set to zero on a flex tune *if you have everything else properly calibrated*. So zeroing it out without fixing the other problems is not my recommendation here - just something that caught my eye. It seems that there also appears to be a fair bit of error in your lambda (vs command), like your fuel tables are possibly off.

Do you have any logfiles from when it had the E85 in it?

Its funny that you say that because now that I think about it more. They only tuned it with 93, and E85. Nothing in between. I reported to them that the car was running very bad on mixture, and the fumes were horrible. They sent a new file within minutes, looks like all they did was just add that 15% as a touchup rather than actually fixing

9thgentwincharge wrote: Tue Mar 24, 2026 6:55 pm

CalibratEd wrote: Tue Mar 24, 2026 2:15 pm

9thgentwincharge wrote: Tue Mar 24, 2026 7:16 am Hey Ed, by any chance will you be able to help me get 93 basemap for the car?

I was under the impression that it was running on 93 already. Did you change to a different calibration?

-Ed

Sorry man just so much going on but I bought the car with a 93 tune, lost that file, sadly. Got a new flex fuel tune and car never felt the same as to when I bought it.

Post a log and the most recent file. You may need to remove the 15% noticed by jeffx if it’s in the new tune. You would then adjust from there. I can look it over to make sure it running safe.

Sucks that you have to go through this. I always recommend to look into the support you get after the tune is done. That pays dividends.

-Ed

9thgentwincharge wrote: Tue Mar 24, 2026 7:02 pm

jeffx wrote: Tue Mar 24, 2026 2:13 pm

9thgentwincharge wrote: Sat Dec 20, 2025 3:22 pm datalog attached

Thanks!

I am not real familiar with tuning on that 9th-gen platform but I'm wondering why there is a 15% overall fuel trim added in the Fuel settings of the calibration that you've uploaded. Generally that should be set to zero on a flex tune *if you have everything else properly calibrated*. So zeroing it out without fixing the other problems is not my recommendation here - just something that caught my eye. It seems that there also appears to be a fair bit of error in your lambda (vs command), like your fuel tables are possibly off.

Do you have any logfiles from when it had the E85 in it?

Its funny that you say that because now that I think about it more. They only tuned it with 93, and E85. Nothing in between. I reported to them that the car was running very bad on mixture, and the fumes were horrible. They sent a new file within minutes, looks like all they did was just add that 15% as a touchup rather than actually fixing

A few other things that caught my eye:
1) You have MAF and MAP based both activated. Like I said I'm not super familiar with tuning this platform but it's been my understanding that it's best to disable the MAF when going forced induction on these 8th/9th gen K-series tunes.
1b) Related to 1) above, if you're going MAP you will need to adjust the MAP WOT determination tables for safer operation under boost.
2) I don't know which 1300cc injectors you're using, but I looked on a Hondata basemap that has the parameters for 1300cc injectors (the calibration doesn't specify WHICH 1300cc injectors, however) and the values in the "Injector Opening Time" 2D tables are way off from what you're running. Make sure these values in your calibraion match the datasheet at your given fuel pressure.
3) POSSIBLY A BIG RED FLAG HERE- whomever built your tune has zeroed out all of the available fuel trim parameters in the Closed Loop section so this is why I saw perfectly flat short term fuel trims on your log even when your AFRs were missing the command by a lot. If I'm wrong, someone else with experience tuning on this platform can chime in and tell us why this isn't a HUGE RED FLAG.
4) your fuel tables seem to need a lot of work
5) why are there Anti lag values entered when you're running a supercharger?
6) there's actually more stuff but right now it's best to focus on the fundamentals of your tune and get it corrected with proper and safe base fueling, proper ignition and then you can adjust for ethanol scaling and power.