1.5T Guide to DIY Flex Fuel Kit for Hondata or KTuner

Gnvanny

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anyone?



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shibles

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I see there's two input wires for the ECT2 port on the Civic, and there's two voltage outputs from the converter. Do these just line up with each other (if so, which signal goes to which input for the ECT2) or is each voltage output the same signal, perhaps one for sending to the ECU and another for an ethanol content gauge? If they're the same signal, do both need to go to the ECT2 port or just one? And if it is just one voltage output to the port, then what other wire needs to go to it (I see there's two wires going to the port plugging into the ECT2).
 

Garyd85gt

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One wire is input from converter the other is ground, the yellow wire in ktuner converter goes to input on ect2
 

shibles

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For those asking for a wiring diagram, this is what I've got from my understanding with the Ktuner converter. Let me know if y'all notice anything wrong.

20191207_165643.jpg
 

bamboka

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You will need to depin the plug for the flex fuel sensor. Looking at the front, you will see a purple cover. Use a small flat head and pop it off from each side. Kodi nox
 
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For those asking for a wiring diagram, this is what I've got from my understanding with the Ktuner converter. Let me know if y'all notice anything wrong.

20191207_165643.jpg
Only one wire runs to the ECT sensor pigtail, and it comes from the KTuner FFC / VOUT1.
 

360glitch

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Oh I see what you're saying. So the ECT doesn't require ground?
No you only have to connect to one of the pins. The ECU handles the rest.
 

shibles

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Good to know, I'll have to fix that after I take it off before I sell it.
 

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Installation is officially complete. She pulls so well in all rpm range. I just need a flex fuel badge now.
 

Donk232

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Im confused, if i get this kit what else do i need? 2 fuel line clamps for the flex fuel sensor, the pin and wiring? but no other parts?
http://a.co/bruW8N8
 

shibles

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Im confused, if i get this kit what else do i need? 2 fuel line clamps for the flex fuel sensor, the pin and wiring? but no other parts?
http://a.co/bruW8N8
I mean all a flex fuel kit is is an ethanol sensor, signal converter, some wiring, and a tune.
 

Donk232

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I mean all a flex fuel kit is is an ethanol sensor, signal converter, some wiring, and a tune.
So the kit is complete aside from attaching it to a car with plugs and harnesses not meant to for the application?
And then a pnp is just ready to go with everything neat and tidy for the install.
 

IronFusion

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I bought a kit, but it also uses ECT2 for readings. Be aware, it looks like the OBD2 Evap Self Checks/tests may not run without an ECT2 Reading. It will yield a Not Ready Status on inspections.
Some places allow one. Few allow two or more. So if you have an O2 Disable too, you may not pass inspections.
Worse still, it's a 👑 PITA to get our Civics to complete a drive cycle that clears the Evap System. So, while COVIDling and racking low miles it takes either a concerted effort or weeks to have Evap Ready.
I'm eventually going to run a pigtail up from ECT2, have a pair of fuses to split the line right under the hood, and two wires run down the same pigtail to dual plugs. I'll be able to leave both eth/ect2 plugged in, and a few weeks before annual inspection, swap the fuse from one spot to the other. Also a quicker way to return to factory tune.
 

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