Breaking up with jb4 no codes!

mia335i · 11-01-2012, 11:08 AM

I have a 09 335 a/t with a jb4 map5 vrsf down pipes Ets fmic and a drop in filter , I'm having some sputtering issues in the top of 2nd gear no to bad but for a good 2 seconds. Anyone know what it can be. Not getting any codes. Car still made 392whp and 442trq on50/50 pump and e85

N55 · 11-01-2012, 11:09 AM

We Need to see a data log.....

Jeff@TopGearSolutions · 11-01-2012, 11:53 AM

You may have shadow codes, could be spark plugs (misfires). Hold old are the spark plugs that's always the first question (and logs).

mia335i · 11-01-2012, 03:16 PM

Quote:

Originally Posted by Jeff@topgearsolutions

You may have shadow codes, could be spark plugs (misfires). Hold old are the spark plugs that's always the first question (and logs).

40k miles waiting roger my laptop backup get some logs

e92oholic · 11-01-2012, 03:46 PM

Spark plugs

PR3CI5N · 11-01-2012, 04:00 PM

Most likely it's just your "Fuel Open Looping" not being at the correct value. When running E-85 the fuel open looping value changes after every time you fill up because the E-85 to gas ratio changes obviously. I just do a few 3rd gear pulls and let the car shift itself @7k until I can feel that my car is dialed in. It will most likely give you the pause you're referring to but after a few pulls you'll fuel open looping value will adjust so that your car doesn't run too lean and bog down. Or it could just be your fuel pump failing but if you're not getting CEL's and no high revs on start ups then I doubt it's your fuel pumps.

mia335i · 11-01-2012, 04:35 PM

Quote:

Originally Posted by PR3CI5N

Most likely it's just your "Fuel Open Looping" not being at the correct value. When running E-85 the fuel open looping value changes after every time you fill up because the E-85 to gas ratio changes obviously. I just do a few 3rd gear pulls and let the car shift itself @7k until I can feel that my car is dialed in. It will most likely give you the pause you're referring to but after a few pulls you'll fuel open looping value will adjust so that your car doesn't run too lean and bog down. Or it could just be your fuel pump failing but if you're not getting CEL's and no high revs on start ups then I doubt it's your fuel pumps.

How high do u consider it being a fuel pump issue

335xiRT1 · 11-01-2012, 05:19 PM

Plugs deff.

If your running a tune you should change plugs every 12-15k

Mike@N54Tuning.com · 11-02-2012, 08:47 AM

Quote:

Originally Posted by 335xiRT1

If your running a tune you should change plugs every 12-15k

+1

We recommend 15-20K for plugs on tuned cars!

Mike

smolik · 11-02-2012, 09:49 AM

Ive had a bunch of misfires, its always been a coil pack. My 1st 335 had over 50k on original plugs, and I''m over 40k now on second 335i. Maybe its just me. both cars tuned most of time.

Spydeputy · 11-02-2012, 01:16 PM

Plugs would be my 1st step too.

11-01-2012, 11:08 AM	#1
mia335i Lieutenant 36 Rep 510 Posts Drives: 07e92 335i Join Date: Nov 2010 Location: miami iTrader: (1)	Breaking up with jb4 no codes! I have a 09 335 a/t with a jb4 map5 vrsf down pipes Ets fmic and a drop in filter , I'm having some sputtering issues in the top of 2nd gear no to bad but for a good 2 seconds. Anyone know what it can be. Not getting any codes. Car still made 392whp and 442trq on50/50 pump and e85
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11-01-2012, 11:09 AM	#2
N55 ⒸⒺⓇⓉⓘⒻⒾⒺⒹ✬ⓃⒾⓃⒿⒶ 137 Rep 1,475 Posts Drives: 🚀 Join Date: Nov 2010 Location: Pittsburgh iTrader: (3) Garage List 2015 BMW M4 [0.00] 2012 BMW 335IS (SOLD) [6.84] 2011 BMW 335XI (SOLD) [4.66] 2008 BMW 335xi (SOLD) [10.00]	We Need to see a data log..... __________________ 2008 335xi E90 - Sold - > 2011 335xi E90 - Sold - > 2012 335IS E92 Crimson Red - SOLD > 2015 M4 Yas Marina Blue SOLD> 2019 McLaren 570s SOLD 2015 Lamborghini Huracan
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11-01-2012, 11:53 AM	#3
Jeff@TopGearSolutions 3442 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	You may have shadow codes, could be spark plugs (misfires). Hold old are the spark plugs that's always the first question (and logs).
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11-01-2012, 03:46 PM	#5
e92oholic Banned 66 Rep 850 Posts Drives: 2013 MINI JCW GP Join Date: Feb 2012 Location: Buffalo NY iTrader: (6)	Spark plugs
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11-01-2012, 04:00 PM	#6
PR3CI5N need4speed 510 Rep 1,903 Posts Drives: 2010 E90 M 335i Join Date: Jun 2010 Location: West Coast iTrader: (24)	Most likely it's just your "Fuel Open Looping" not being at the correct value. When running E-85 the fuel open looping value changes after every time you fill up because the E-85 to gas ratio changes obviously. I just do a few 3rd gear pulls and let the car shift itself @7k until I can feel that my car is dialed in. It will most likely give you the pause you're referring to but after a few pulls you'll fuel open looping value will adjust so that your car doesn't run too lean and bog down. Or it could just be your fuel pump failing but if you're not getting CEL's and no high revs on start ups then I doubt it's your fuel pumps. __________________ N54
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11-01-2012, 05:19 PM	#8
335xiRT1 Captain 47 Rep 693 Posts Drives: 2007 335i Join Date: Oct 2008 Location: long island iTrader: (14)	Plugs deff. If your running a tune you should change plugs every 12-15k
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11-02-2012, 09:49 AM	#10
smolik First Lieutenant 30 Rep 312 Posts Drives: AW F30 335i Join Date: Oct 2007 Location: South Florida iTrader: (0)	Ive had a bunch of misfires, its always been a coil pack. My 1st 335 had over 50k on original plugs, and I''m over 40k now on second 335i. Maybe its just me. both cars tuned most of time.
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11-02-2012, 01:16 PM	#11
Spydeputy Brigadier General 205 Rep 3,523 Posts Drives: 2015 F23 M235i/2008,E90,335xi Join Date: Aug 2008 Location: The County, Maryland iTrader: (19) Garage List 2017 X5 M Sport Pac ... [0.00] 2015 M235i, F23 [0.00]	Plugs would be my 1st step too.
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