E85 + OFT + headers: stalls out on cold start - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ixobelle · 05-14-2017, 08:43 PM

Each morning my BRZ needs a few tries to turn over. It coughs and sputters, then dies out if I can't get it to catch on the first try. Usually on the second or third try it catches, then runs fine (great, even!) once it warms up.

I'm thinking it has to do with the E85... I've enjoyed the extra oomph it provides, but without a true flex fuel kit, I'm afraid it just isn't properly tuned for this fuel.

Has anyone else run into this? I may try running this tank low and swapping back to a normal flash for 91.

Bay Area CA if that helps. It's not crazy cold in the mornings, or anything extreme.

ajcarson11 · 05-14-2017, 09:01 PM

If its under 60f degrees I almost always have to crank the engine twice on high mixtures of E85. If i'm running something like E70 it usually starts on first crank, but otherwise it takes minimum two cranks. This is totally normal according to Moto-Mike at Moto-East.

What mixture of E85 are you running? Temps?

smg1138 · 05-14-2017, 09:02 PM

That's pretty normal when running the OFT E85 tune. Something I've found that seems to help is leaving the key in the accessory position for about 10 seconds before actually starting the engine. I have a garage now, so it's not much of an issue, but I used to see stalling issues anytime temps got below 60F.

steve99 · 05-14-2017, 09:06 PM

Modify you cranking injector pulse tables and it should start first crank doen to about 40f and maybe lower on e70

See tune tweaks link below

ixobelle · 05-15-2017, 04:09 AM

Quote:

Originally Posted by steve99

Modify you cranking injector pulse tables and it should start first crank doen to about 40f and maybe lower on e70

See tune tweaks link below

Thanks all for the responses, I'll dig into the flash mods, and see if I can figure it out. Mostly happy to see it's not just me!

thatfilipinoguy · 05-15-2017, 05:55 AM

Where in Antioch are you at?! I thought I was the only one out here.

DAEMANO · 05-15-2017, 01:41 PM

Quote:

Originally Posted by ixobelle

Thanks all for the responses, I'll dig into the flash mods, and see if I can figure it out. Mostly happy to see it's not just me!

Do what @steve99 said. If you don't or can't, then simply adding 1 to 1.5 gallons of premium pump gas to every 9 gallons of e85 will resolve this issue completely and barely affect performance. I've been running this way for about 2.5 years. The car starts perfectly in cold weather. Other options would be to upgrade to an Openflash flex fuel kit and use the tune that comes with it.

ixobelle · 05-15-2017, 05:37 PM

Quote:

Originally Posted by thatfilipinoguy

Where in Antioch are you at?! I thought I was the only one out here.

Just off Hillcrest... look for the plate

ixobelle · 05-16-2017, 12:52 PM

I made a video showing how to do this in RomRaider:

[ame="https://www.youtube.com/watch?v=kULTsJRhJcs"]Coldstart Issues with e85/headers/OFT (fixed with RomRaider) - YouTube[/ame]

05-14-2017, 08:43 PM	#1
ixobelle KPOP TRASH Join Date: Apr 2017 Drives: 2015 BRZ Location: Antioch, CA Posts: 35 Thanks: 11 Thanked 9 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	E85 + OFT + headers: stalls out on cold start Each morning my BRZ needs a few tries to turn over. It coughs and sputters, then dies out if I can't get it to catch on the first try. Usually on the second or third try it catches, then runs fine (great, even!) once it warms up. I'm thinking it has to do with the E85... I've enjoyed the extra oomph it provides, but without a true flex fuel kit, I'm afraid it just isn't properly tuned for this fuel. Has anyone else run into this? I may try running this tank low and swapping back to a normal flash for 91. Bay Area CA if that helps. It's not crazy cold in the mornings, or anything extreme.

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05-14-2017, 09:01 PM	#2
ajcarson11 Senior Member Join Date: Jun 2015 Drives: 2013 Subaru BRZ Limited (Black) Location: Indianapolis Posts: 511 Thanks: 253 Thanked 206 Times in 149 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	If its under 60f degrees I almost always have to crank the engine twice on high mixtures of E85. If i'm running something like E70 it usually starts on first crank, but otherwise it takes minimum two cranks. This is totally normal according to Moto-Mike at Moto-East. What mixture of E85 are you running? Temps?

05-14-2017, 09:02 PM	#3
smg1138 Senior Member Join Date: Jan 2014 Drives: 2013 Raven FR-S Location: Nashville Posts: 775 Thanks: 968 Thanked 213 Times in 136 Posts Mentioned: 3 Post(s) Tagged: 2 Thread(s)	That's pretty normal when running the OFT E85 tune. Something I've found that seems to help is leaving the key in the accessory position for about 10 seconds before actually starting the engine. I have a garage now, so it's not much of an issue, but I used to see stalling issues anytime temps got below 60F.

05-14-2017, 09:06 PM	#4
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,996 Thanks: 1,035 Thanked 4,994 Times in 2,984 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	Modify you cranking injector pulse tables and it should start first crank doen to about 40f and maybe lower on e70 See tune tweaks link below

05-15-2017, 05:55 AM	#6
thatfilipinoguy Senior Member Join Date: Jul 2013 Drives: 87 Supra, 13 FRS, 05 FXT Location: Honolulu, CA Posts: 485 Thanks: 229 Thanked 144 Times in 118 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Where in Antioch are you at?! I thought I was the only one out here.

05-16-2017, 12:52 PM	#9
ixobelle KPOP TRASH Join Date: Apr 2017 Drives: 2015 BRZ Location: Antioch, CA Posts: 35 Thanks: 11 Thanked 9 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I made a video showing how to do this in RomRaider: [ame="https://www.youtube.com/watch?v=kULTsJRhJcs"]Coldstart Issues with e85/headers/OFT (fixed with RomRaider) - YouTube[/ame]

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