N54Tech.com - International Turbo Racing Discussion
(#1)
Old
Indo Rider's Avatar
Indo Rider Indo Rider is offline
Junior Member
 
Posts: 246
Join Date: Sep 2010
Car: 135
Default HPFP/LPFP issue or just too much e85? - 06-22-2013, 01:16 PM

Hey guys, lemme know what you think... I've limped a couple times recently with the 29E2 code, usually in 4th shortly after the shift or toward the top at around 6K rpms. The logs (example below) show the HPFP pressure taking a nose dive and throttle closing, and maybe LP also going too low? Is there any way to tell from this log if I'm just running too much 85 or if my HPFP or LPFP is weak, or other? This is right around 50% E85, 50% 93 by volume, about the highest concentration of E85 I've used. I'm pretty sure the car was about to limp like this once after the shift into 4th as it hesitated a bit/felt rough so I backed off the throttle for about a second and then floored it again and completed the strong pull through all of 4th without any limp/code (no log of that though). Any thoughts welcome, thanks!
Attached Images
 


2009 135i 6MT Jet Black, FBO+
Reply With Quote
(#2)
Old
Lifted07Duramax Lifted07Duramax is offline
Junior Member
 
Posts: 169
Join Date: Jan 2013
Car: bmw 335i
Default 06-22-2013, 02:44 PM

Which column is lpfp and which column is hpfp on the csv file
Reply With Quote
(#3)
Old
trebila's Avatar
trebila trebila is offline
Legend
 
Posts: 1,280
Join Date: Mar 2013
Car: 135i
Default 06-22-2013, 03:03 PM

Try with the ISO 19 if it's the same.


FBO N54 AT 135i 'vert with JB4 and Trebila Performance custom flash
Reply With Quote
(#4)
Old
lvmark lvmark is offline
New Member
 
Posts: 23
Join Date: Mar 2014
Car: '07 335i sedan A/T
Default 03-23-2014, 11:49 AM

I have same issue. On a 4th gear pull from 2000 rpm and up, car cuts out at 5000-5200 rpm. 29e2 code. I have new hpfp (about 1 year old, 8k miles) and just put in an in line pump. Did you ever find what your problem was?


'07 335i AT, RB turbos, jb4 g5 ISO, backend flash, DP, FMIC, DCI, KW V1's
Reply With Quote
(#5)
Old
Indo Rider's Avatar
Indo Rider Indo Rider is offline
Junior Member
 
Posts: 246
Join Date: Sep 2010
Car: 135
Default 03-23-2014, 02:35 PM

I actually saw your other post and was thinking it was very similar to this issue I had but didn't reply because I couldn't remember exactly what my resolution was. I know it wasn't the LPFP or HPFP itself because I never replaced those. I think I was changing JB4 firmwares a lot around that time and that was a couple months before I did the BB backend flash for the first time. I think I chalked it up to running too much E85 for the stock fuel system and no backend flash. I really wish I could remember, but my best guess is that I backed off on the amount of E85 until I did the backend flash. Definitely didn't have the issue after the backend flash. Only other thing I can think of that might be related is I know I replaced my low pressure fuel pressure sensor (was getting the code for it), but can't remember exactly when. Wish I could help more because it does seem very similar. I even downloaded your logs and they look like mine in this thread... You are running map 7 though right? I was map 3 fwiw. Do you have the backned flash? I would definitely look into that if not.


2009 135i 6MT Jet Black, FBO+
Reply With Quote
(#6)
Old
lvmark lvmark is offline
New Member
 
Posts: 23
Join Date: Mar 2014
Car: '07 335i sedan A/T
Default 03-23-2014, 02:44 PM

I am running a back end flash(race file). I have was sure it was a lpfp problem, but I have installed the in line pump. I was leaning towards replacing the pressure sensor, but wanted to see if there were any setting or adjustments I could make before throwing parts at it. I see others have adjusted the future use B value to 2?


'07 335i AT, RB turbos, jb4 g5 ISO, backend flash, DP, FMIC, DCI, KW V1's
Reply With Quote
(#7)
Old
Indo Rider's Avatar
Indo Rider Indo Rider is offline
Junior Member
 
Posts: 246
Join Date: Sep 2010
Car: 135
Default 03-23-2014, 05:30 PM

I never tried disabling open loop fuel learning, but yeah some people have luck with that. FYI, that's FUD = 2 now instead of FUB since the changes to methanol safety post ISO 27.8.


2009 135i 6MT Jet Black, FBO+
Reply With Quote
(#8)
Old
kseyfi86's Avatar
kseyfi86 kseyfi86 is offline
Junior Member
 
Posts: 151
Join Date: Mar 2014
Car: 07 e92 335i
Default 03-24-2014, 10:23 AM

Same thing is going on with my car in 4th gear!

My logs also show that my HPFP all of a sudden dies in the high rpms. It happens more frequently with higher percentages of E85 though. Can it just be a result of me not flashing my car for E85 yet and NOT the HPFP as the issue?

I attached my log for reference as well


JB4 - 451whp/489wtq @ EAS
Reply With Quote
(#9)
Old
chuckd05 chuckd05 is offline
Junior Member
 
Posts: 296
Join Date: Sep 2011
Car: 08 135i , 06 325xi e90
Default 03-24-2014, 10:41 AM

your lp is all over the place... dipping up and down... put more 93 in and re log... or get a inline pump


e92
Reply With Quote
(#10)
Old
kseyfi86's Avatar
kseyfi86 kseyfi86 is offline
Junior Member
 
Posts: 151
Join Date: Mar 2014
Car: 07 e92 335i
Default 03-24-2014, 11:19 AM

Quote:
Originally Posted by chuckd05
your lp is all over the place... dipping up and down... put more 93 in and re log... or get a inline pump
We've got 91 down here... do you basically mean dilute the e85? I heard from Russell in my earlier post that my LPFP was not something to worry about considering it was over 50?

I'm literally starting from zero knowledge on forced induction haha. I'm hoping my HPFP gets worse so I can swap it out under warranty and narrow that problem out. I'm eager to run a worry free e85 monster already


JB4 - 451whp/489wtq @ EAS
Reply With Quote
(#11)
Old
lvmark lvmark is offline
New Member
 
Posts: 23
Join Date: Mar 2014
Car: '07 335i sedan A/T
Default 03-24-2014, 11:26 AM

On my car, I have the inline pump installed. Still same issue. I'm lean towards the fuel rail pressure sensor being the problem??!


'07 335i AT, RB turbos, jb4 g5 ISO, backend flash, DP, FMIC, DCI, KW V1's
Reply With Quote
(#12)
Old
kseyfi86's Avatar
kseyfi86 kseyfi86 is offline
Junior Member
 
Posts: 151
Join Date: Mar 2014
Car: 07 e92 335i
Default 03-24-2014, 12:03 PM

Quote:
Originally Posted by lvmark
On my car, I have the inline pump installed. Still same issue. I'm lean towards the fuel rail pressure sensor being the problem??!
Possibly. Are you considering trying that out?


JB4 - 451whp/489wtq @ EAS
Reply With Quote
(#13)
Old
kseyfi86's Avatar
kseyfi86 kseyfi86 is offline
Junior Member
 
Posts: 151
Join Date: Mar 2014
Car: 07 e92 335i
Default 03-24-2014, 12:35 PM

*Update*

I emailed Terry and just got this as his response:

"Looks like a 29F2 code. I'd set AFR values to 0 and reduce open loop
setting to correct that."

I'm going to try that tonight or tomorrow.

I looked at pictures of the user interface online since I'm not at my laptop, any idea how to set AFR values? I havent seen an option for that yet...

Also, what increment is recommended to reduce the open loop?

I ask here because I don't want to bug Terry over and over.

Any input is appreciated. Thanks!


JB4 - 451whp/489wtq @ EAS
Reply With Quote
(#14)
Old
Russell @ BMS's Avatar
Russell @ BMS Russell @ BMS is offline
Tuner
 
Posts: 5,673
Join Date: Nov 2008
Car: 2009 335i AT
Cool 03-24-2014, 01:27 PM

AFR can be adjusted under User Adjustment Tab and All Map AFR column values. Set all these values to zero if not already.

If you want to lower FOL set FUD to 2 to disable automatic learning.
Then reduce the Fuel Open Loop value by 10 until the problem goes away or your fuel trims approach 50 (max value).


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#15)
Old
kseyfi86's Avatar
kseyfi86 kseyfi86 is offline
Junior Member
 
Posts: 151
Join Date: Mar 2014
Car: 07 e92 335i
Default 03-24-2014, 02:37 PM

Quote:
Originally Posted by Russell @ BMS
AFR can be adjusted under User Adjustment Tab and All Map AFR column values. Set all these values to zero if not already.

If you want to lower FOL set FUD to 2 to disable automatic learning.
Then reduce the Fuel Open Loop value by 10 until the problem goes away or your fuel trims approach 50 (max value).
Thanks Russell, I'll keep you guys updated once I mess with the new settings.


JB4 - 451whp/489wtq @ EAS
Reply With Quote
(#16)
Old
kseyfi86's Avatar
kseyfi86 kseyfi86 is offline
Junior Member
 
Posts: 151
Join Date: Mar 2014
Car: 07 e92 335i
Default 03-27-2014, 10:24 AM

Quote:
Originally Posted by Russell @ BMS
AFR can be adjusted under User Adjustment Tab and All Map AFR column values. Set all these values to zero if not already.

If you want to lower FOL set FUD to 2 to disable automatic learning.
Then reduce the Fuel Open Loop value by 10 until the problem goes away or your fuel trims approach 50 (max value).
*Update*

Yours and Terry's advice worked!

No limp mode, just clean pulls one after the other. Finally!


JB4 - 451whp/489wtq @ EAS
Reply With Quote
(#17)
Old
dx1541 dx1541 is offline
Junior Member
 
Posts: 35
Join Date: Dec 2013
Car: 335i DCT
Default 03-28-2014, 05:02 PM

Yeah until the time when the hpfp gives up so be happy.... For now.... Lol!
Reply With Quote
(#18)
Old
Jnat Jnat is offline
Junior Member
 
Posts: 179
Join Date: Oct 2012
Car: 09 335xi
Default 03-29-2014, 06:22 AM

What does lowering the open loop fuel do so I understand?


09 335XI /Cobb ATR TUNED 18.5 psi/DCI/2ND ***** '''''''/E20/Alpina/VRSF 7inch/VRSF Chargepipe with Tial BOV***
Reply With Quote
(#19)
Old
kseyfi86's Avatar
kseyfi86 kseyfi86 is offline
Junior Member
 
Posts: 151
Join Date: Mar 2014
Car: 07 e92 335i
Default 03-30-2014, 11:30 AM

Quote:
Originally Posted by Jnat
What does lowering the open loop fuel do so I understand?
+1


JB4 - 451whp/489wtq @ EAS
Reply With Quote
(#20)
Old
one30five one30five is offline
New Member
 
Posts: 24
Join Date: May 2014
Car: 2011 135i
Default 06-22-2014, 03:36 PM

Quote:
Originally Posted by Russell @ BMS
AFR can be adjusted under User Adjustment Tab and All Map AFR column values. Set all these values to zero if not already.

If you want to lower FOL set FUD to 2 to disable automatic learning.
Then reduce the Fuel Open Loop value by 10 until the problem goes away or your fuel trims approach 50 (max value).
Does this apply to n55 ISO? I installed walbro 255 and everything feels fine. But I'm getting a check light on and off and got a p10cf code for low rail pressure.
Running e50 (approximately) I don't want to mess with settings if this doesn't apply to n55
Reply With Quote
(#21)
Old
Steve 335i Steve 335i is offline
Junior Member
 
Posts: 85
Join Date: Jan 2014
Car: 2009 BMW 335i
Default 06-23-2014, 07:32 AM

I had similar problems and it never duplicated after putting fresh plugs in the car and replacing a bad coil.


2009 E90 335i
Reply With Quote
(#22)
Old
frmtl2_335i's Avatar
frmtl2_335i frmtl2_335i is offline
Junior Member
 
Posts: 305
Join Date: Mar 2013
Car: 07 e92 M/T
Default 06-25-2014, 07:25 AM

If the suggested adjustments don't work, try changing the "All map CPS" value 1500 to 50... this might help you balance the trims that look a little high and put less stress on the hpfp. If this doesn't work idk lol. Maybe a bad batch of e85? Have you tested the e85? Your inline pump shouldn't have a problem with e50.


FFTEC 6466 Gen2, MHD Flash Tuned by Wedge, BMS PI Kit, FUEL-IT Stg 3 pump, HALTECH PS-1000, MFactory LSD w/lock down brace, ECS Trailing Arms, M3 control arms, M3 brace, DGR Coilovers, N20 tmap sensor, BMS OCC, VRSF exhaust w/4" tips, VRSF CP, Tial BOV. BigTom FMIC, Msport front & rear, m3 sides skirts.
12.23 @ 118.9mph (RBs)
2.3 60' lol (single pass night, bog shifting)
Reply With Quote
(#23)
Old
frmtl2_335i's Avatar
frmtl2_335i frmtl2_335i is offline
Junior Member
 
Posts: 305
Join Date: Mar 2013
Car: 07 e92 M/T
Default 06-25-2014, 07:26 AM

Quote:
Originally Posted by Steve 335i
I had similar problems and it never duplicated after putting fresh plugs in the car and replacing a bad coil.
+1

What plugs are you using? If NGK, did you gap them before installing them? How old are they?


FFTEC 6466 Gen2, MHD Flash Tuned by Wedge, BMS PI Kit, FUEL-IT Stg 3 pump, HALTECH PS-1000, MFactory LSD w/lock down brace, ECS Trailing Arms, M3 control arms, M3 brace, DGR Coilovers, N20 tmap sensor, BMS OCC, VRSF exhaust w/4" tips, VRSF CP, Tial BOV. BigTom FMIC, Msport front & rear, m3 sides skirts.
12.23 @ 118.9mph (RBs)
2.3 60' lol (single pass night, bog shifting)
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2020, N54tech.com