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Old 04-20-2020, 05:58 PM   #1
airrick
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Delicious flex fuel w/ oft

Im on OFT E85 tune. I am planning on tuning it next month, since i wanted to install it instead of my tuner. $120 labor. Yea no thanks.

My question is, if i install it and im on an OFT e85 tune, will it affect the fuel delivery in any way? Would it even work? Or would i need an ecutek tune and all that? Im not trying to use my e85 oft tune as a flex fuel tune for my kit, just using as a normal fuel line until i actually get it tuned


If it does my other solution is, just to install and not install the fuel lines and sensor.

Thanks!
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Old 04-20-2020, 06:31 PM   #2
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The sensor won't do anything and won't affect anything until you get it tuned.

You can install it, leave the sensor unplugged, and continue driving. You can even plug it in if you want to use the app to see your E%.


Most tunes already disable the Rear O2 sensor reading (if you're using one that adopts the Rear O2 connector). The ECU won't know what to do with the sensor reading (or even know that it's there) until you get a tune that can tell the ECU how to use it. If you plug the sensor in on a stock tune, you'll get a Rear O2 CEL.
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Old 04-20-2020, 09:53 PM   #3
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The sensor won't do anything and won't affect anything until you get it tuned.

You can install it, leave the sensor unplugged, and continue driving. You can even plug it in if you want to use the app to see your E%.


Most tunes already disable the Rear O2 sensor reading (if you're using one that adopts the Rear O2 connector). The ECU won't know what to do with the sensor reading (or even know that it's there) until you get a tune that can tell the ECU how to use it. If you plug the sensor in on a stock tune, you'll get a Rear O2 CEL.
Yea i installed it. Drove it around the block for a bit, seems fine. Yea I unplugged the O2 sensor on it to see my Ethanol content was always curious. 73% E so not bad.

just waitin on my JDL 4-2-1 headers.
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Old 04-20-2020, 11:15 PM   #4
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Yea i installed it. Drove it around the block for a bit, seems fine. Yea I unplugged the O2 sensor on it to see my Ethanol content was always curious. 73% E so not bad.

just waitin on my JDL 4-2-1 headers.

If you got a rear 02 connect flex kit, you getting ecutek tune for flex ?. Oft tunes only support evap connect flex kits not rear 02 and only pre facelift cars
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Old 04-20-2020, 11:48 PM   #5
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If you got a rear 02 connect flex kit, you getting ecutek tune for flex ?. Oft tunes only support evap connect flex kits not rear 02 and only pre facelift cars
yea i know that. I've had OFT for like 2 years now its time to go over to ecutek. Eventually going to boost probably in a year. I installed it since the shop wanted to do it for $120. Im going back to the shop for the eventual flex fuel dyno tune on ecutek.

TDLR; im being cheap.
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Old 01-10-2022, 09:54 PM   #6
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I'm trying to locate the CPC sensor lead to use the FlexFuel OFT Tune. The document they sent doesn't look like anything in the kick well. Any help on locating that CPC lead would be very helpful!

Here is the image of the terminal blocks I can't find! HELP

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Old 01-11-2022, 11:22 AM   #7
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I'm trying to locate the CPC sensor lead to use the FlexFuel OFT Tune. The document they sent doesn't look like anything in the kick well. Any help on locating that CPC lead would be very helpful!

Here is the image of the terminal blocks I can't find! HELP

Should be banned for posting this more than once.
Even worse twice in the same sub-forum.
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Old 01-11-2022, 03:04 PM   #8
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Should be banned for posting this more than once.
Even worse twice in the same sub-forum.
I didn't want to help because of this but I can't help myself.


https://support.openflashtablet.com/...-flex-fuel-kit

Connecter A35, pin 20, orange/black wire if using Evap reference.

Yes it is a PITA to get to and requires a good amount of car yoga.
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Old 01-16-2022, 11:31 AM   #9
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Or if you want it to be easier, you can do this... I managed to find one on ebay for $55

https://www.xero-limit.com/brz-gt86-evap-harness.html

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Old 01-28-2022, 01:10 AM   #10
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Originally Posted by steve99 View Post
If you got a rear 02 connect flex kit, you getting ecutek tune for flex ?. Oft tunes only support evap connect flex kits not rear 02 and only pre facelift cars
Doesn't the ecutek and oft both support the evap and 0.5v-4.5v and 0v-5v?
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Old 01-28-2022, 08:12 AM   #11
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the scaling, you should be able to set in on the table of the patched rom
but OFT only support evap connection, so the signal must go there

with ecutek you have no limit, you could remove maf and put flex fuel sensor on the maf connector and it works
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