N54Tech.com - International Turbo Racing Discussion
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marcus510 marcus510 is offline
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Car: BMW 2009 335i
Default 03-17-2021, 02:13 AM

Quote:
Originally Posted by giovany7
Hey guys, I am new to this forum but hoping to get some help. I just got a doc race single turbo installed and I am having an engine malfunction after getting the BEF and Single turbo firmware for the JB4. The car is running perfectly but I I am getting: 2ABC- DME: Boost pressure sensor, electric
3100- DME: Boost pressure control, deactivation.
This happened to me recently when I installed the bmp forward facing manifold with their supplied PNP tmap wire. Ended up having to extend the bms tmap adapter and the problem went away.


2009 335i | N54 | JB4 | MHD | DOC RACE 6266BB |
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(#3102)
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Alpha27Wp Alpha27Wp is offline
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Car: Bmw e90 lci 335i
Default 03-24-2021, 12:02 AM

Thank you @marcus510. I will attempt to write the data via tuner pro. I don't have a trusted tuner & support sucks locally where I'm from.
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(#3103)
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313 313 is offline
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Car: 135i
Default 03-27-2021, 02:56 AM

Hi , everybody.
I would like to get some opinion on my build from you guys.
I have n54 with single turbo kit installed. Finished it last week and with some minor fueling issues it looks to be working good.

Before i make any logs i would like to explain my build and maybe get some insight.
engine : N54 with 120k miles
Index 12 injectors
Walbro 450 lpfp
1 stage colder plugs
--
custom exhaust manifold with holset hx40super
1 tial 44mm wg
3" DP and exhaust
3,5 bar tmap sensor
3 port mac solenoid
FMIC
Alu charge pipe + forge bov
jb4 + ST BEF
--
What is different from other builds is that i installed my primary O2 sensors to DP not to manifold. So i have no comparison to bank1 and bank 2 AFR. I did it because 99% of builders i asked told me to install them to DP.
But jb4 does monitor AFR between bank 1 and 2. So that safety feature is gone for me.
WG pressure is 8,6 psi and it was holding around 9. No codes so far.

Few pictures :



Last edited by 313; 03-27-2021 at 09:33 AM..
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(#3104)
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Arrtus Arrtus is offline
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Car: 2009 135i 6MT
Default 05-08-2021, 07:30 AM

Anyone know if it's possible for a single turbo to underboost (below wastegate spring) due to JB4 settings? If so, which settings would cause something like that?
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(#3105)
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DamnDatsun DamnDatsun is offline
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Car: 2010 135i msport
Default 05-09-2021, 03:21 PM

Quote:
Originally Posted by Arrtus
Anyone know if it's possible for a single turbo to underboost (below wastegate spring) due to JB4 settings? If so, which settings would cause something like that?

It shouldn't be possible. Id look for vacuum leaks.
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(#3106)
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Arrtus Arrtus is offline
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Default 05-17-2021, 11:54 AM

I have been working on this stupid issue for over a month now and can't figure it out. The system is completely leak free and it doesn't make sense why the car can't make more than 10 PSI on map 1 with a 14PSI spring. It's extremely laggy and even on map 2 doesn't go above 12PSI. Sounds like a the wastegate is oscillating between being open and closed when hitting 12 PSI on map 2 but testing the wastegate does not show that it has any leaks or improper function.

I know for a fact that there are no leaks anywhere. I have checked everything more times than I can count at this point. I've done boost leak testing, fog testing, reinstallations, replacing parts.

I am using the OTS single turbo maps off the forum and have it flashed using MHD and JB4. I'm using the IJE0S tunes... my car is a 2009 and has a production date of 09/08. Is the tune correct for my car?
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(#3107)
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313 313 is offline
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Default 06-01-2021, 12:17 AM

Quote:
Originally Posted by Arrtus
I have been working on this stupid issue for over a month now and can't figure it out. The system is completely leak free and it doesn't make sense why the car can't make more than 10 PSI on map 1 with a 14PSI spring. It's extremely laggy and even on map 2 doesn't go above 12PSI. Sounds like a the wastegate is oscillating between being open and closed when hitting 12 PSI on map 2 but testing the wastegate does not show that it has any leaks or improper function.

I know for a fact that there are no leaks anywhere. I have checked everything more times than I can count at this point. I've done boost leak testing, fog testing, reinstallations, replacing parts.

I am using the OTS single turbo maps off the forum and have it flashed using MHD and JB4. I'm using the IJE0S tunes... my car is a 2009 and has a production date of 09/08. Is the tune correct for my car?
Did you install wastegate properly ? I managed to forget to install valve seat that works as a seal. So wastegate was not closed properly. As you can assume that caused problems.
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(#3108)
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ferocious ferocious is offline
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Car: 335i N54 2008
Default 06-01-2021, 01:00 AM

Quote:
Originally Posted by Arrtus
I have been working on this stupid issue for over a month now and can't figure it out. The system is completely leak free and it doesn't make sense why the car can't make more than 10 PSI on map 1 with a 14PSI spring. It's extremely laggy and even on map 2 doesn't go above 12PSI. Sounds like a the wastegate is oscillating between being open and closed when hitting 12 PSI on map 2 but testing the wastegate does not show that it has any leaks or improper function.

I know for a fact that there are no leaks anywhere. I have checked everything more times than I can count at this point. I've done boost leak testing, fog testing, reinstallations, replacing parts.

I am using the OTS single turbo maps off the forum and have it flashed using MHD and JB4. I'm using the IJE0S tunes... my car is a 2009 and has a production date of 09/08. Is the tune correct for my car?




try Swapping the vacuum hoses on your MAC solenoid between port 1 and port 2, then try again



2008 335i N54 FFtech Top Mount single turbo Precision 6266
JB4 G5 , VRSF 7" FMIC , VRSF CP + HKS BOV, Tial Wastegates
BMS METH KIT IN CONJUNCTION WITH MMP PI WITH 1055CC INJECTORS, PURE M1 METH,TMAP 3.5,
FUEL-IT STAGE2 BUCKETLESS LPFP, RB PCV. JB$ MHD BACKEND FLASH, xHP Stage2 v1.5
more to come...
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(#3109)
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Eracer76 Eracer76 is offline
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Car: 335xi
Default 06-06-2021, 07:18 PM

I'm hoping someone can help give me some ideas to try and fix my issue...
My car just randomly started acting up after it sat all winter, getting painted at a body shop.
It keeps throwing codes (2ABC - DME: Boost-Pressure sensor, electric) and (3100 - Boost-Pressure control, deactivation)
The car will start up, run, idle, and rev up just fine... but as soon as I try driving it around the block, I can't even get it over 2,000 RPM without it throwing those two codes and going into limp mode. Its like the gas pedal won't even let me get over 2,000 RPM... I shut the car off, clear the codes, and it starts right back up and idles like nothing is wrong.

The car is a Z4 35i with a Speedtech 6266 kit with all the extras possible and running 100% E85... JB4 G5 with PI and the correct updated firmware, correct ST BEF, MAC solenoid, 3.5 Tmap.

I've tried a new 3.5 Tmap, I've tried the stock Tmap w/JB4 set to 0. I've tried changing the JB4's Tmap setting, verifying the car doesn't even run while on the wrong setting, then runs fine when I switch it back... I've tried a new 4 port MAC solenoid. I've tried removing the JB4 altogether and flashing back to a stage 2 map, but that didn't work due to not having the correct boost solenoids. I then reinstalled the JB4 while double checking everything was correct, and I'm still getting the same codes every time I try driving the car over 2,000 RPM.

At this point, I'm at a complete loss as to what it could be.


2009 BMW Z4 35i 6spd mt: Speedtech single turbo w/ all the goods!
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(#3110)
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Mayomoney Mayomoney is offline
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Car: 335i
Default 07-17-2021, 09:24 AM

Has anyone taken picture of the correct pins to unplug.is it male pins or female pins I'm disconnecting? Also will the ses light from disconnecting these pins cause any issues.i dont mind the light for time being.


2007 e92, BMP PI, Speedtech Precision 6466, PR stage 3 450, JB4/MHD,JB4 PI controller, MHD, 7.5 VRSF intercooler, PR coils, 3.5Tmap,Muffler delete, ClutchMaster FX850 clutch race,e85

Last edited by Mayomoney; 07-20-2021 at 11:55 AM..
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(#3111)
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Rc Pete Rc Pete is offline
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Car: 17 GTI
Default 07-20-2021, 03:53 PM

Quote:
Originally Posted by 313
Hi , everybody.
I would like to get some opinion on my build from you guys.
I have n54 with single turbo kit installed. Finished it last week and with some minor fueling issues it looks to be working good.

Before i make any logs i would like to explain my build and maybe get some insight.
engine : N54 with 120k miles
Index 12 injectors
Walbro 450 lpfp
1 stage colder plugs
--
custom exhaust manifold with holset hx40super
1 tial 44mm wg
3" DP and exhaust
3,5 bar tmap sensor
3 port mac solenoid
FMIC
Alu charge pipe + forge bov
jb4 + ST BEF
--
What is different from other builds is that i installed my primary O2 sensors to DP not to manifold. So i have no comparison to bank1 and bank 2 AFR. I did it because 99% of builders i asked told me to install them to DP.
But jb4 does monitor AFR between bank 1 and 2. So that safety feature is gone for me.
WG pressure is 8,6 psi and it was holding around 9. No codes so far.

Few pictures :


Hows this working?
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(#3112)
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313 313 is offline
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Posts: 11
Join Date: Mar 2021
Car: 135i
Default 08-16-2021, 10:18 AM

Hi,
Works great. Only thing that went wrong with the build was o2 sensor position. At first i installed those to ******** but that just dosent work like that. After i installed them to manifold it's been running great.
After about 3000 miles no codes , no dead o2 sensors etc.
Still taking my time to push the car at higher boost levels. Currently running 17psi.
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(#3113)
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Daily Three Daily Three is offline
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Car: E90 335i
Default 08-19-2021, 12:39 PM

lol once you turn it up the o2s will being to pop.. kiss those 3000 miles goodbye. If I get 1000 with heat sinks i'm happy. I haven't got a 1000 miles out of an o2 in a good 4 years sooo.. good luck
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(#3114)
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worstplayer66 worstplayer66 is offline
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Join Date: Sep 2021
Car: 135i N54 6MT
Default Maxed fuel trims - 09-01-2021, 07:21 PM

Hoping someone can point me in the right direction because I'm stumped. I replaced all 4 o2 sensors and I'm still maxing out fuel trims. I would say my HPFP is getting weak, causing my trims to max and AFR go lean, but the weird thing is the best logs I get are in 4th gear on e50. Trims look decent there. 3rd gear e50 trims are maxed. 3rd and 4th gear on 93 trims are maxed. Don't get it. Definitely running the HP_F down real low to the 7's at times on e50 , but even on 93 with HP_F at 10-11 I'm getting fuel trims maxed. Any help is greatly appreciated!

Relevant parts/info listed below:
-Speedtech single kit with PTE5862 Gen1
-Stage 2 LPFP/Walbro 450
-Index 12 inejctors
-All 4 Bosch o2 sensors with less than 100 miles on them.
-IJE0S BEF - E85 for E50 logs, Pump for 93 logs.

Datazap links:
https://***********/u/tyleryates/max...ms-93-4th-gear
https://***********/u/tyleryates/max...log=0&data=1-4
https://***********/u/tyleryates/max...log=0&data=1-4
https://***********/u/tyleryates/max...log=0&data=1-4
Attached Images
    
Attached Files
File Type: csv e50-3rd-gear.csv (10.0 KB, 23 views)
File Type: csv e50-4th-gear.csv (12.3 KB, 24 views)
File Type: csv 93-3rd-gear.csv (10.4 KB, 24 views)
File Type: csv 93-4th-gear.csv (13.7 KB, 25 views)

Last edited by worstplayer66; 09-01-2021 at 07:34 PM.. Reason: Added Datazap links
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(#3115)
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Tier3gb Tier3gb is offline
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Join Date: Sep 2021
Car: 91 240sx
Default Doc single turbo helix pump running rough and rich. Fresh install - 09-22-2021, 01:57 PM

I have finished installing my doc race kit, oem index 12 injectors (coded) and brand new Bosch oxygen sensors. During install we also installed precision raceworks coils, and VTT dual catch can. We have uploaded the latest version of the single turbo firmware and have copied the user adjustments to a T and uploaded yhe basemap backend flash from DocVu tuning.
Basically the car will run great upon start up. The AFR2 sensor is extremely erratic and the trim 1 is erratic and slowly count to up over time till it maxes itself out. At this point the car is rough idling and smoking black out the tailpipe. Pulled plugs on all cylinders to show 4,5,6 all soot fouled, while the front 3 are great. We have swapped the entire bank of front Injectors to the rear to eliminate a possible bad injector. No change. We have swapped oxygen sensor for other new units, as well as from front to rear bank physically, and electrically at the plug. We have verified no vacuum leaks. So I'm at a decent loss here about where to go next. Any insight would be greatly appreciated. I will attach a 3 minute idle data log.
Attached Files
File Type: csv idle log.csv (266.1 KB, 17 views)
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(#3116)
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cero2000 cero2000 is offline
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Car: 2008 BMW 335i 6spd
Default 2008 e92 335i 6spd - 10-03-2021, 02:40 PM

Good Morning everyone,
I am new to this forum and finally put my e92 N54 Doc race precision 6266 ball bearing single turbo kit on. I have a feeling I might have loaded the wrong OTS map for single turbo. The mods I have installed are

- I am on 93 octane at the moment.

- JB4 with MHD BEF

- Port injection with intake manifold

- fuel it stage 3 primary pump 450 and secondary 520 pump.

- 3.5 bar map

- VRSF charge pipe

- VRSF 3.5" exhaust

-VRSF 7.5" FMIC

- PCV delete

- Tail Sport blow off valve

- Mishimoto oil catch can

I am curious as to knowing which off the shelf map I should be running. I more than likely loaded the wrong one. I am getting no error codes but also not building as much as boost as I was before in the other maps. I have zero leaks. If any one can guide me in the right direction here, would truly appreciate it. Not sure if Terry would answer this far into this thread.
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