E85 studder's on startup

E90SoFlo · 06-23-2012, 02:55 PM

Running a 50/50 mix of E85 and 93, when the car is cold and you start it, run's rough and stutters, seems almost like a misfire, I have had a HPFP code pop up, forgot to write it down.

If I run pure 93 I have no issues.

Lulz_M3 · 06-23-2012, 02:58 PM

Known issue with running E85, worse the colder the weather gets.

E90SoFlo · 06-23-2012, 02:58 PM

Quote:

Originally Posted by Lulz_M3

Known issue with running E85, worse the colder the weather gets.

Good thing I live in FLORIDAAAA

lol

Thanks lull

Dmacc · 06-23-2012, 03:20 PM

If you have fresh injectors and plugs, this isn't an issue from what I've heard

Lulz_M3 · 06-23-2012, 03:38 PM

Have you logged since adding the E85? Curious what your fuel trims look like? I'm only running about 25%

E90SoFlo · 06-23-2012, 03:47 PM

Quote:

Originally Posted by Lulz_M3

Have you logged since adding the E85? Curious what your fuel trims look like? I'm only running about 25%

Not yet, Florida has been raining for like 4 days straight.

yaaay florida haha

spool twice · 06-23-2012, 04:01 PM

try a lower mixture like 35%.

enrita · 06-23-2012, 04:57 PM

Run 1/4 tank only. Thats enough for good octane .

beemerboy305 · 06-23-2012, 04:57 PM

FUCK FLORIDA MAN!!! IVE HAD e85 in my gas tank for passed 2 days FUCKIN RAINING RAINING ALL WEEK!

Epic404 · 06-23-2012, 05:09 PM

Quote:

Originally Posted by E90SoFlo

Running a 50/50 mix of E85 and 93, when the car is cold and you start it, run's rough and stutters, seems almost like a misfire, I have had a HPFP code pop up, forgot to write it down.

If I run pure 93 I have no issues.

The rain has sucked here. I run 50/50 and had 3 fuel system codes pop at once during WOT recently but it hasn't happened again. My car runs good cold start and great at op temp, no real issues. Might be because I have fresh coils and spark plugs. I read that jb4 tunes dont activate until the car reaches 160 degrees. I'm not sure if this includes commands that mediate the differences in using E85 vs unleaded?

E90SoFlo · 06-23-2012, 05:29 PM

Quote:

Originally Posted by beemerboy305

FUCK FLORIDA MAN!!! IVE HAD e85 in my gas tank for passed 2 days FUCKIN RAINING RAINING ALL WEEK!

You should drive around just to keep it mixed up.

Lulz_M3 · 06-23-2012, 05:32 PM

Why is the rain stopping you guys? I just went and did 4 3rd gear pulls to get some logs, no issues whatsover.

E90SoFlo · 06-23-2012, 05:41 PM

Quote:

Originally Posted by Lulz_M3

Why is the rain stopping you guys? I just went and did 4 3rd gear pulls to get some logs, no issues whatsover.

Because I'm under tornado warnings!! lol

Nice looking VD!!

Bagelfast · 06-23-2012, 06:06 PM

Quote:

Originally Posted by enrita

Run 1/4 tank only. Thats enough for good octane .

+1 havent seen much of a difference in 25% to 45% for me personally.

spool twice · 06-23-2012, 06:07 PM

wow Tornado warnings down south? Yikes!

It was dry this morning until noon, i was able to get some E85 runs. Tropical depression Debbie

spool twice · 06-23-2012, 06:08 PM

Quote:

Originally Posted by 1LUMI

+1 havent seen much of a difference in 25% to 45% for me personally.

me either, my logs tells me my car is just as happy with a lower ratio vs. a 50/50 ratio.

MilehighM3 · 06-23-2012, 06:31 PM

Quote:

Originally Posted by Epic404

I read that jb4 tunes dont activate until the car reaches 160 degrees

I think it's 180, same as procede. Shouldn't be getting on it before the oil temps come up anyway!

Yodaime · 06-23-2012, 06:40 PM

BETTY!

spool twice · 06-23-2012, 07:06 PM

JB4 activates at 160F oil temp

Bagelfast · 06-23-2012, 10:28 PM

My car on a 35% mix of E85, it doesnt FIRE right up as when on pure 93 octane.. I have tested this and seen it for myself.

But this is the nature of E85..E85 is known to give a little extra delay in starting, hence on many other platforms they have a increase in cranking time.

If the car is running good on WOT and datalogs well i wouldnt worry about it.

benzy89 · 06-24-2012, 01:04 AM

Try something less aggressive, a 50:50 mix of 93 + E85 balances out to 99 octane. Run a 2:1 mix of 93 + E85 will have you at 97 which might be a little easier on the car.

Here's an E85 Octane Mix Calculator: http://www.intercepteft.com/calc.html

ianthegreat · 06-24-2012, 12:10 PM

Mine studders a bit as well, but pulls right out of it after the initial startup - less than 5 seconds and the studder is mild.

60/40

06-23-2012, 02:55 PM	#1
E90SoFlo Banned 196 Rep 2,669 Posts Drives: E90 335i Join Date: Jun 2011 Location: Naples, FL iTrader: (9)	E85 studder's on startup Running a 50/50 mix of E85 and 93, when the car is cold and you start it, run's rough and stutters, seems almost like a misfire, I have had a HPFP code pop up, forgot to write it down. If I run pure 93 I have no issues.
	Appreciate 0 Tweet Quote

06-23-2012, 02:58 PM	#2
Lulz_M3 Banned 33 Rep 1,029 Posts Drives: AW 335i 6MT Join Date: Oct 2011 Location: Jax, Fl iTrader: (0)	Known issue with running E85, worse the colder the weather gets.
	Appreciate 0 Quote

06-23-2012, 03:20 PM	#4
Dmacc Colonel 200 Rep 2,799 Posts Drives: 2011 BMW 1M Join Date: Mar 2010 Location: So Cal iTrader: (1)	If you have fresh injectors and plugs, this isn't an issue from what I've heard __________________ thanks to MGallop
	Appreciate 0 Quote

06-23-2012, 03:38 PM	#5
Lulz_M3 Banned 33 Rep 1,029 Posts Drives: AW 335i 6MT Join Date: Oct 2011 Location: Jax, Fl iTrader: (0)	Have you logged since adding the E85? Curious what your fuel trims look like? I'm only running about 25%
	Appreciate 0 Quote

06-23-2012, 04:01 PM	#7
spool twice Rainbow Racer 1008 Rep 2,539 Posts Drives: BMW M4cs Join Date: Sep 2010 Location: Tampa Bay, FL Area iTrader: (7) Garage List 2019 M4cs [0.00]	try a lower mixture like 35%. __________________ -Loe P.- Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU \| Pullies + basic bolt-on mods \| 10.861@127.90mph ] Current Car: F82 M4cs \| TT-RS \| On Order: i4 M50
	Appreciate 0 Quote

06-23-2012, 04:57 PM	#8
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	Run 1/4 tank only. Thats enough for good octane . __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
	Appreciate 0 Quote

06-23-2012, 04:57 PM	#9
beemerboy305 Lieutenant 20 Rep 584 Posts Drives: M3 E90 Join Date: Apr 2012 Location: Tampa/Sarasota Fl iTrader: (1)	FUCK FLORIDA MAN!!! IVE HAD e85 in my gas tank for passed 2 days FUCKIN RAINING RAINING ALL WEEK!
	Appreciate 0 Quote

06-23-2012, 05:32 PM	#12
Lulz_M3 Banned 33 Rep 1,029 Posts Drives: AW 335i 6MT Join Date: Oct 2011 Location: Jax, Fl iTrader: (0)	Why is the rain stopping you guys? I just went and did 4 3rd gear pulls to get some logs, no issues whatsover. Attached Images
	Appreciate 0 Quote

06-23-2012, 06:07 PM	#15
spool twice Rainbow Racer 1008 Rep 2,539 Posts Drives: BMW M4cs Join Date: Sep 2010 Location: Tampa Bay, FL Area iTrader: (7) Garage List 2019 M4cs [0.00]	wow Tornado warnings down south? Yikes! It was dry this morning until noon, i was able to get some E85 runs. Tropical depression Debbie __________________ -Loe P.- Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU \| Pullies + basic bolt-on mods \| 10.861@127.90mph ] Current Car: F82 M4cs \| TT-RS \| On Order: i4 M50
	Appreciate 0 Quote

06-23-2012, 07:06 PM	#19
spool twice Rainbow Racer 1008 Rep 2,539 Posts Drives: BMW M4cs Join Date: Sep 2010 Location: Tampa Bay, FL Area iTrader: (7) Garage List 2019 M4cs [0.00]	JB4 activates at 160F oil temp __________________ -Loe P.- Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU \| Pullies + basic bolt-on mods \| 10.861@127.90mph ] Current Car: F82 M4cs \| TT-RS \| On Order: i4 M50
	Appreciate 0 Quote

06-23-2012, 10:28 PM	#20
Bagelfast Lieutenant Colonel 125 Rep 1,546 Posts Drives: BMW Join Date: Sep 2008 Location: USA iTrader: (0)	My car on a 35% mix of E85, it doesnt FIRE right up as when on pure 93 octane.. I have tested this and seen it for myself. But this is the nature of E85..E85 is known to give a little extra delay in starting, hence on many other platforms they have a increase in cranking time. If the car is running good on WOT and datalogs well i wouldnt worry about it.
	Appreciate 0 Quote

06-24-2012, 01:04 AM	#21
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	Try something less aggressive, a 50:50 mix of 93 + E85 balances out to 99 octane. Run a 2:1 mix of 93 + E85 will have you at 97 which might be a little easier on the car. Here's an E85 Octane Mix Calculator: http://www.intercepteft.com/calc.html
	Appreciate 0 Quote

06-24-2012, 12:10 PM	#22
ianthegreat Colonel 60 Rep 2,314 Posts Drives: n54 Join Date: Apr 2008 Location: Pittsburgh/Houston iTrader: (1)	Mine studders a bit as well, but pulls right out of it after the initial startup - less than 5 seconds and the studder is mild. 60/40
	Appreciate 0 Quote