JB4 issues, No Codes

ricestang · 01-31-2015, 11:46 AM

A little background on my car, hit 50k miles last year took it to BMW had it walnut blasted and plugs changed under warranty. Uninstalled the JB4 at about 48k miles and the car was running great. Now 6 months later with 65k miles the car its still running great, I installed the JB4 a few days ago and I'm really confused on what the heck is going on with this thing. With it on Map0 it runs just fine, switch it to Map1 and the car boosts hard randomly at half throttle and at WOT it stuggles to get to 13psi. It stutters and bounces between 9-13psi, and the best part is its not getting any codes.

Haven't had a chance to log it yet but any input would be amazing right now.

ShocknAwe · 01-31-2015, 12:06 PM

Load the latest firmware and try again. If it still happens, log it.

Make sure you are running the correct firmware for your engine as well.

ricestang · 01-31-2015, 01:38 PM

I havent changed a thing on my JB4 since the last time I had it installed.

loesch · 01-31-2015, 01:54 PM

Make sure the auto code clearing is off as well. Upgrade to ISO firmware if you haven't already and confirm the diodes are correctly cut.

ricestang · 01-31-2015, 02:21 PM

Its the older board, not the G5, so I'm a little confused on what update to do.

loesch · 01-31-2015, 02:36 PM

Oh got ya. I was telling you about ISO assuming you had a G5 board. Honestly I'd pay the $150 to upgrade it to G5. You won't be sorry. It's a huge improvement and there have been tons of breakthroughs on the N54 platform since BMS stopped development of the G4 boards. Methanol injection improvements, isolated boost control, back end flash support, large turbo support, timing readings on all 6 cylinders, there's probably tons more but that's what comes to mind right now.

http://www.burgertuning.com/N54_JB4_upgrades.html

Solo_M_Tech · 02-01-2015, 03:45 AM

it sounds like something isn't quite right with the install. maybe a poor or loose connection....... i'd double check everything.

ricestang · 02-01-2015, 12:38 PM

Quote:

Originally Posted by HooningB2G

it sounds like something isn't quite right with the install. maybe a poor or loose connection....... i'd double check everything.

Didn't see this post until now but I believe you are correct. I pulled everything last night and checked everything, the power wire seemed to be coming loose, I put a new connector on it and the car seems to be running a lot smoother. Boost seems to be set at around 11-12psi on map1, not too sure when the last time this thing has been updated. I believe its a G4 board, here's a pic if someone could let me know. I'm thinking I will spend the $150 for the G5.

ricestang · 02-02-2015, 05:26 PM

Trying to upgrade to the G5 board, I live in CA and they will not ship it too me. What do you CA guys do? Ship to a friend out of state?

box_man · 02-02-2015, 05:47 PM

Quote:

Originally Posted by ricestang

Trying to upgrade to the G5 board, I live in CA and they will not ship it too me. What do you CA guys do? Ship to a friend out of state?

I think that is the only workaround right now. I had to do that with a charge Pipe

01-31-2015, 11:46 AM	#1
ricestang New Member 0 Rep 26 Posts Drives: 1995 Supra 6spd QSV PTE6466 Join Date: Feb 2013 Location: Pleasanton, CA iTrader: (0)	JB4 issues, No Codes A little background on my car, hit 50k miles last year took it to BMW had it walnut blasted and plugs changed under warranty. Uninstalled the JB4 at about 48k miles and the car was running great. Now 6 months later with 65k miles the car its still running great, I installed the JB4 a few days ago and I'm really confused on what the heck is going on with this thing. With it on Map0 it runs just fine, switch it to Map1 and the car boosts hard randomly at half throttle and at WOT it stuggles to get to 13psi. It stutters and bounces between 9-13psi, and the best part is its not getting any codes. Haven't had a chance to log it yet but any input would be amazing right now.
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01-31-2015, 12:06 PM	#2
ShocknAwe 1Addict 3228 Rep 7,889 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	Load the latest firmware and try again. If it still happens, log it. Make sure you are running the correct firmware for your engine as well. __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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01-31-2015, 01:38 PM	#3
ricestang New Member 0 Rep 26 Posts Drives: 1995 Supra 6spd QSV PTE6466 Join Date: Feb 2013 Location: Pleasanton, CA iTrader: (0)	I havent changed a thing on my JB4 since the last time I had it installed. __________________
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01-31-2015, 01:54 PM	#4
loesch Captain 129 Rep 917 Posts Drives: 2011 BMW 135i M Sport Join Date: Feb 2012 Location: State College, PA iTrader: (4)	Make sure the auto code clearing is off as well. Upgrade to ISO firmware if you haven't already and confirm the diodes are correctly cut. __________________ 2011 135i M Sport 6MT LeMans Blue \| Active Autowerke Gen II axle back \| Berk d******* \| N54 gutted mids \| FuelIt Walbro 450 fuel pump \| Pure Turbos Stage 2 \| 3.5bar TMAP \| Pure Turbos inlet pipe \| BMS intake \| BMS oil catch can \| ETS intercooler \| ETS charge pipe \| BMS JB4 w/ ISO firmware \| BMS backend flash stacked on PPK \| Eibach springs \| Whiteline rear subframe bushing inserts \| cosmetic tidbits
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01-31-2015, 02:21 PM	#5
ricestang New Member 0 Rep 26 Posts Drives: 1995 Supra 6spd QSV PTE6466 Join Date: Feb 2013 Location: Pleasanton, CA iTrader: (0)	Its the older board, not the G5, so I'm a little confused on what update to do. __________________
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01-31-2015, 02:36 PM	#6
loesch Captain 129 Rep 917 Posts Drives: 2011 BMW 135i M Sport Join Date: Feb 2012 Location: State College, PA iTrader: (4)	Oh got ya. I was telling you about ISO assuming you had a G5 board. Honestly I'd pay the $150 to upgrade it to G5. You won't be sorry. It's a huge improvement and there have been tons of breakthroughs on the N54 platform since BMS stopped development of the G4 boards. Methanol injection improvements, isolated boost control, back end flash support, large turbo support, timing readings on all 6 cylinders, there's probably tons more but that's what comes to mind right now. http://www.burgertuning.com/N54_JB4_upgrades.html __________________ 2011 135i M Sport 6MT LeMans Blue \| Active Autowerke Gen II axle back \| Berk d******* \| N54 gutted mids \| FuelIt Walbro 450 fuel pump \| Pure Turbos Stage 2 \| 3.5bar TMAP \| Pure Turbos inlet pipe \| BMS intake \| BMS oil catch can \| ETS intercooler \| ETS charge pipe \| BMS JB4 w/ ISO firmware \| BMS backend flash stacked on PPK \| Eibach springs \| Whiteline rear subframe bushing inserts \| cosmetic tidbits Last edited by loesch; 01-31-2015 at 02:43 PM..
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02-01-2015, 03:45 AM	#7
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	it sounds like something isn't quite right with the install. maybe a poor or loose connection....... i'd double check everything. __________________ 2014 M5 6MT
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02-02-2015, 05:26 PM	#9
ricestang New Member 0 Rep 26 Posts Drives: 1995 Supra 6spd QSV PTE6466 Join Date: Feb 2013 Location: Pleasanton, CA iTrader: (0)	Trying to upgrade to the G5 board, I live in CA and they will not ship it too me. What do you CA guys do? Ship to a friend out of state?
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