Is it safe to flash to non FF tune with 18% E in tank? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

haute · 01-29-2020, 08:57 PM

Not sure if the tune is just Non FF or non E85 tune, but I need to flash back and go to the tune so I can plug my o2 sensor back in for emissions.

Let’s assume that it is non E85: E18 would be fine right?

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Tcoat · 01-29-2020, 09:19 PM

Quote:

Originally Posted by haute

Not sure if the tune is just Non FF or non E85 tune, but I need to flash back and go to the tune so I can plug my o2 sensor back in for emissions.

Let’s assume that it is non E85: E18 would be fine right?

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Just go for a long drive and burn off some more. Should be OK with 18 anyway really.

steve99 · 01-29-2020, 10:36 PM

Anythong under about 30% ethanol will be fine thier is a lot of fueling adjustment and more E means more knock resistance and if you on a petrol tune it will jave low ignition advance compared to an ethanol tune

Stomachbuzz · 01-30-2020, 02:08 PM

lol, just out of curiosity, how did you figure it's 18%?

jflogerzi · 01-30-2020, 04:16 PM

Most fuel has 10-15e content already in it. So that would do much. Watch your fuel trims and keep from going wot till your FTs stabilize

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Lantanafrs2 · 01-30-2020, 05:31 PM

Maybe he has a gauge?

jflogerzi · 01-30-2020, 05:42 PM

Quote:

Originally Posted by Lantanafrs2

Maybe he has a gauge?

Not likely if he is using oft. Maybe test strips

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haute · 01-30-2020, 08:03 PM

Quote:

Originally Posted by jflogerzi

Not likely if he is using oft. Maybe test strips

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I have EcuTek

Quote:

Originally Posted by Stomachbuzz

lol, just out of curiosity, how did you figure it's 18%?

I have a gauge from DT.

jflogerzi · 01-30-2020, 08:06 PM

Quote:

Originally Posted by haute

I have EcuTek

I have a gauge from DT.

Do you have a flex fuel tune? If so this whole thread was for not lol

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finch1750 · 01-30-2020, 08:08 PM

Quote:

Originally Posted by jflogerzi

Do you have a flex fuel tune? If so this whole thread was for not lol

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He had flex fuel. Needs stock tune for emissions

jflogerzi · 01-30-2020, 08:14 PM

Quote:

Originally Posted by finch1750

He had flex fuel. Needs stock tune for emissions

Ahhh okay that makes sense.

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DarkSunrise · 01-30-2020, 08:32 PM

I've driven for about 10 miles on e85 with the stock tune when I had some issues flashing the e85 tune. Was fine. Fuel trims jumped to 20-25 percent, but I just kept the rpms low and tried to stay off the throttle. No problems, not even a CEL.

bfrank1972 · 01-30-2020, 11:04 PM

Just don't romp on it, keep it in closed loop and ecu should be able to compensate fine based on o2 sensor feedback.

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kev0 · 01-30-2020, 11:48 PM

Quote:

Originally Posted by bfrank1972

Just don't romp on it, keep it in closed loop and ecu should be able to compensate fine based on o2 sensor feedback.

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What do you mean by keep it in closed loop? Sorry.

01-29-2020, 08:57 PM	#1
haute Member Join Date: Jul 2019 Drives: 37J Location: MIDWEST Posts: 20 Thanks: 6 Thanked 1 Time in 1 Post Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Is it safe to flash to non FF tune with 18% E in tank? Not sure if the tune is just Non FF or non E85 tune, but I need to flash back and go to the tune so I can plug my o2 sensor back in for emissions. Let’s assume that it is non E85: E18 would be fine right? Sent from my iPhone using Tapatalk

01-30-2020, 08:32 PM	#12
DarkSunrise Senior Member Join Date: Apr 2012 Drives: 22 BRZ (Previously 13 FR-S) Location: USA Posts: 5,798 Thanks: 2,187 Thanked 4,243 Times in 2,221 Posts Mentioned: 48 Post(s) Tagged: 2 Thread(s)	I've driven for about 10 miles on e85 with the stock tune when I had some issues flashing the e85 tune. Was fine. Fuel trims jumped to 20-25 percent, but I just kept the rpms low and tried to stay off the throttle. No problems, not even a CEL. __________________ "Never run out of real estate, traction, and ideas at the same time." 2022 BRZ Build 2013 FR-S Build

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01-29-2020, 10:36 PM	#3
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,996 Thanks: 1,035 Thanked 4,993 Times in 2,983 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	Anythong under about 30% ethanol will be fine thier is a lot of fueling adjustment and more E means more knock resistance and if you on a petrol tune it will jave low ignition advance compared to an ethanol tune

01-30-2020, 02:08 PM	#4
Stomachbuzz Senior Member Join Date: Apr 2019 Drives: 2013 FRS Location: Washington DC Posts: 177 Thanks: 93 Thanked 61 Times in 38 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	lol, just out of curiosity, how did you figure it's 18%?

01-30-2020, 05:31 PM	#6
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,570 Thanks: 2,579 Thanked 3,132 Times in 1,684 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Maybe he has a gauge?

01-30-2020, 11:04 PM	#13
bfrank1972 Senior Member Join Date: Jul 2013 Drives: 2013 FR-S Argento Location: Westport,CT Posts: 1,855 Thanks: 517 Thanked 1,041 Times in 616 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	Just don't romp on it, keep it in closed loop and ecu should be able to compensate fine based on o2 sensor feedback. Sent from my SM-G965U using Tapatalk

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