2012 civic si calibration help

2012+ US/Canadian Civic Si / 2013+ ILX
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Rino
Posts: 4
Joined: Sun Jan 18, 2026 10:02 am

2012 civic si calibration help

Post by Rino »

Ngl this place is not really reliable and I’m starting to regret buying a honda as my first car. I bought a 2012 civic si and didn’t know it was a fully modded NA.
-Rbc manifold
-Rdx injectors
-skunk2 CAI
-custom dp and exhaust
-72mm throttle body
I guess the previous owner put it back to stock or something and was only drivable for a while till it acted up and haven’t drove it since. I check the car and replace oil, spark plugs, etc. and found out it has something to do with the tune. Bought a flashpro, thought basemap could help NOPE!, no tuners nearby, and even cant find people who sell e tunes. Looked around online, forums, just about everywhere to try and do it myself, can’t find shit that’s helpful or people who can help.Idk but everything about the 9th gen and my experience have been disappointing and unreliable. This forum is basically dead as well, I’m just trying my luck at this point But if anyone’s there please help.
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Hondata
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Location: Torrance, CA
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Re: 2012 civic si calibration help

Post by Hondata »

You post has a bogus IP address, which often indicates a bot or spammer. If you are human, apologies.

Please give the serial number of your FlashPro and product a calibration/datalog.

viewtopic.php?t=26993
Hondata
Rino
Posts: 4
Joined: Sun Jan 18, 2026 10:02 am

Re: 2012 civic si calibration help

Post by Rino »

Apologies for being rude, I’m just really frustrated because I’ve been trying to work on it for months even tho I recently got the car.
My idle was being erratic and surging and we couldn’t figure out why and so we replaced the pedal assembly, spark plugs, coil packs and cleaned the O2 sensors as well.the throttle body seem to be pretty clean so we just clean the sensors. After idle relearn we got it to a good idle. But it would start giving engine cell after a certain rpm while trying to test drive it to get gas as it was running out. The base map I ran during that was “CAI,RBC intake, cat delete, cat back exhaust” I changed the current injector size to 440cc and increase throttle flow vs opening to 27% from bits of info I found from online for those those products.
So I found the injectors latency based used for 410cc Rdx injectors and change into that so I have to do another idle relearn again but because it surging and erratic I’m pretty scared to do anymore atm. I’m new to all this and I can’t get in touch with a tuner or someone who knows how to tune at the moment so it’s very frustrating.
I just want it to be drivable.

The tb is a ktuned 72mm


FP-2012Si-321103
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Rino
Posts: 4
Joined: Sun Jan 18, 2026 10:02 am

Re: 2012 civic si calibration help

Post by Rino »

If possible would u be able to create basemap base on the mods that I’ve seen on the car just to see if that will work?

Mods
-RBC manifold
-k-tuned 72 mm dbw throttle body
-skunk2 CAI
-410cc Rdx injectors(Im assuming)
-hybrid racing fuel rail with pressure gauge
-c(a)tless down pipe

Sorry again
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CalibratEd
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Re: 2012 civic si calibration help

Post by CalibratEd »

Post the calibration you are running and I can take a look at the calibration and datalog.

-Ed
Instagram: calibrated.tuning
Rino
Posts: 4
Joined: Sun Jan 18, 2026 10:02 am

Re: 2012 civic si calibration help

Post by Rino »

Found out the p2135 code is back again so I can’t idle at all, I replaced the app assembly and it was gone but it’s back again. I have to look into it again.

But it seemed to idle at this calibration until the code poped up
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