Flex Fuel cold start stumble - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

post_break · 02-20-2014, 10:54 AM

I just thought I'd post my log of an E85 cold start with flex fuel. The first start always stumbles and dies. Second start fires perfectly.

I'll be working with my tuner to fix this and hope to learn what the issue was. So take a peak.

jamesm · 02-20-2014, 11:03 AM

Probably needs more cranking ipw compensation for the ethanol content.

Ironsquid · 02-20-2014, 11:10 AM

could be a vacuum leak also

lol

jamesm · 02-20-2014, 11:18 AM

Quote:

Originally Posted by Ironsquid

could be a vacuum leak also

lol

^ i see what you did there

Ironsquid · 02-20-2014, 01:02 PM

Quote:

Originally Posted by jamesm

^ i see what you did there

Could also be the tuners fault. *drops the mic* @Sportsguy83

BTW, James we good for next weekend?

jamesm · 02-20-2014, 01:09 PM

Quote:

Originally Posted by Ironsquid

Could also be the tuners fault. *drops the mic* @Sportsguy83

BTW, James we good for next weekend?

Yes sir

Ironsquid · 02-20-2014, 01:14 PM

Quote:

Originally Posted by jamesm

Yes sir

Awesome can't wait, Temps have been good but it varies. Hopefully nothing arises too.

post_break · 02-20-2014, 01:43 PM

Quote:

Originally Posted by jamesm

Probably needs more cranking ipw compensation for the ethanol content.

Can that be adjusted based on ethanol percentage? So if you increase that for E85, would there be issues keeping it the same for E10?

jamesm · 02-20-2014, 01:48 PM

Quote:

Originally Posted by post_break

Can that be adjusted based on ethanol percentage? So if you increase that for E85, would there be issues keeping it the same for E10?

It's part of the flex fuel setup. A custom map that scales cranking ipw to the output of the ECA scaler map. So yes it's adjusted based on ethanol content automatically once set up properly.

2point0 · 02-20-2014, 02:02 PM

Quote:

Originally Posted by post_break

I just thought I'd post my log of an E85 cold start with flex fuel. The first start always stumbles and dies. Second start fires perfectly.

I'll be working with my tuner to fix this and hope to learn what the issue was. So take a peak.

Same here, but not FF. Just using OFT E85 map. Staring at RomRaider this morning to get some sense of what needs to be changed.

http://www.ft86club.com/forums/showt...=46468&page=53

See posts #1150-1152.

post_break · 02-20-2014, 02:45 PM

Quote:

Originally Posted by 2point0

Same here, but not FF. Just using OFT E85 map. Staring at RomRaider this morning to get some sense of what needs to be changed.

http://www.ft86club.com/forums/showt...=46468&page=53

See posts #1150-1152.

Yeah mine does the same thing. Not that it's "cold" just hasn't been started in a while. 8 hours and it won't start on first try. 4 hours it will fire right up. Once when it was really cold, like 30ish it refused to start. I had to try 4-5 times and give it gas to finally come alive.

jamesm · 02-20-2014, 02:47 PM

Bump up the cranking ipw or cranking enrichment just a bit at a time until it fires up first crank.

post_break · 04-02-2014, 01:40 PM

Just an update. Visconti has pulled through again and my cold start fires every time and now the exhaust cams (I have no idea what I'm talking about) are silent.

I was setting off car alarms before. Now my unlock beep is louder than my exhaust.

[ame="https://www.youtube.com/watch?v=EzEHsjHYeUA"]flex fuel cold start - YouTube[/ame]

02-20-2014, 11:10 AM	#3
Ironsquid King of Kiwi Palace Join Date: Aug 2012 Drives: Faster than you Location: Everywhere Posts: 585 Thanks: 184 Thanked 578 Times in 264 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	could be a vacuum leak also lol __________________

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02-20-2014, 11:03 AM	#2
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,293 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	Probably needs more cranking ipw compensation for the ethanol content.

02-20-2014, 02:47 PM	#12
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,293 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	Bump up the cranking ipw or cranking enrichment just a bit at a time until it fires up first crank.

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