Cold start misfires... FBO+E85

Bagelfast · 08-23-2012, 05:09 PM

Every morning, on regular pump or E85, Map0 and Map5, i get
cylinder 1, cylinder 3, cylinder 4 and cylinder 6 misfires, along with multiple misfire code.

I just changed all my plugs about 2K miles ago.. Car has 25,000 miles.

Are my injectors going? Or what can the problem be?
Otherwise car runs great, logs fine etc.

OpenFlash · 08-23-2012, 05:14 PM

You need to alter your fuel map to offer more fuel when coolant temp is low and engine speed is below 3000rpm. Relay that message to Terry@BMS

GetSomeE92 · 08-23-2012, 06:22 PM

If it is happening on Map 0 (stock bypass) then I would imagine it isn't necessarily an issue with the JB4. The fuel pump could be going out on you.

Stucks · 08-23-2012, 06:41 PM

Doesnt the jb4 run in bypass mode until the oil temp is 160 degrees?

GetSomeE92 · 08-23-2012, 06:45 PM

Quote:

Originally Posted by Stucks

Doesnt the jb4 run in bypass mode until the oil temp is 160 degrees?

It does. Good point.

Most likely culprit is a fuel pump or injector(s).

Zebra99 · 08-23-2012, 08:49 PM

Quote:

Originally Posted by GetSomeE92

Quote:

Originally Posted by Stucks

Doesnt the jb4 run in bypass mode until the oil temp is 160 degrees?

It does. Good point.

Most likely culprit is a fuel pump or injector(s).

Uhoh...warranty fix?

Bagelfast · 08-23-2012, 10:54 PM

Thanks for the replys..

Not sure what to think here... Im guessing a problem like this is usually injectors?

hemi to e90 · 08-23-2012, 11:26 PM

where u getting e85?

themyst · 08-23-2012, 11:38 PM

Quote:

Originally Posted by hemi to e90

where u getting e85?

two stations off sunrise highway. Probably not too bad if you live in Brooklyn.

I get mine upstate.

PS: OP, your injectors are likely bad. At least the car's telling you which cylinders they are.

hemi to e90 · 08-25-2012, 12:33 AM

Quote:

Originally Posted by themyst

two stations off sunrise highway. Probably not too bad if you live in Brooklyn.

I get mine upstate.

PS: OP, your injectors are likely bad. At least the car's telling you which cylinders they are.

they arent listed? might go get a few gallons haha

Bagelfast · 08-25-2012, 10:53 AM

Quote:

Originally Posted by hemi to e90

where u getting e85?

Sunrise highway... Not that bad of a drive at all.. Fill my car and 2 6 gallon containers

Quote:

Originally Posted by themyst

two stations off sunrise highway. Probably not too bad if you live in Brooklyn.

I get mine upstate.

PS: OP, your injectors are likely bad. At least the car's telling you which cylinders they are.

yea I think injectors r def the cause but with so low miles sucks... But it's not giving me no ses lights or performance issues.. Just that I see the code which only come up on start up. Car starts good not really that bad otherwise. I let the car sit for two days and put it on map 0 and started it.. No misfire codes.. I'm gonna try the same again today on map 0.

I guess when I have time I can dealer it to have em take a look but don't want the long process for something not that serious

cn555ic · 08-25-2012, 11:19 AM

Maybe you should just stick with 93 octane and not worry about E85 and trying to get every single HP out of the car. It will solve alot of your misfiring on cold startups.. Its better in the long run for your car.. I rather use GT104 race gas and call it day even if its more expensive. I mean its not Like your going WOT at every light!
Use it when you know you need to race or go to the track. I mean is it possible the E85 caused all your issues in the car? There hasn't been enough conclusive results with prolong usage of E85.

08-23-2012, 05:09 PM	#1
Bagelfast Lieutenant Colonel 132 Rep 1,546 Posts Drives: BMW Join Date: Sep 2008 Location: USA iTrader: (0)	Cold start misfires... FBO+E85 Every morning, on regular pump or E85, Map0 and Map5, i get cylinder 1, cylinder 3, cylinder 4 and cylinder 6 misfires, along with multiple misfire code. I just changed all my plugs about 2K miles ago.. Car has 25,000 miles. Are my injectors going? Or what can the problem be? Otherwise car runs great, logs fine etc.
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08-23-2012, 05:14 PM	#2
OpenFlash 1806 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	You need to alter your fuel map to offer more fuel when coolant temp is low and engine speed is below 3000rpm. Relay that message to Terry@BMS
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08-23-2012, 06:22 PM	#3
GetSomeE92 Major 36 Rep 1,176 Posts Drives: '09 Space Gray E92 Join Date: Mar 2011 Location: Miami, FL iTrader: (7)	If it is happening on Map 0 (stock bypass) then I would imagine it isn't necessarily an issue with the JB4. The fuel pump could be going out on you.
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08-23-2012, 06:41 PM	#4
Stucks Lieutenant Colonel 180 Rep 1,911 Posts Drives: 2017 F30 340i Xdrive Join Date: Oct 2010 Location: Montgomery County, MD iTrader: (12)	Doesnt the jb4 run in bypass mode until the oil temp is 160 degrees? __________________ Current: 2017 F30 340i xdrive Previous: 2008 e92 335i coupe: RB turbos, mach 116 race fuel, methanol, alot of boost. Previous: 2003 Honda Accord V6 coupe: AEM V2, zex 75 wet shot (sold)
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08-23-2012, 10:54 PM	#7
Bagelfast Lieutenant Colonel 132 Rep 1,546 Posts Drives: BMW Join Date: Sep 2008 Location: USA iTrader: (0)	Thanks for the replys.. Not sure what to think here... Im guessing a problem like this is usually injectors?
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08-23-2012, 11:26 PM	#8
hemi to e90 dat boost doe 242 Rep 1,828 Posts Drives: 10 335i 21 740li Join Date: Aug 2005 Location: nyc iTrader: (1)	where u getting e85? __________________
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08-25-2012, 11:19 AM	#12
cn555ic 460 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Maybe you should just stick with 93 octane and not worry about E85 and trying to get every single HP out of the car. It will solve alot of your misfiring on cold startups.. Its better in the long run for your car.. I rather use GT104 race gas and call it day even if its more expensive. I mean its not Like your going WOT at every light! Use it when you know you need to race or go to the track. I mean is it possible the E85 caused all your issues in the car? There hasn't been enough conclusive results with prolong usage of E85. Last edited by cn555ic; 08-25-2012 at 11:30 AM..
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