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Reload this Page Trims & both bank AFRs oscillating +car jerking while highway cruising w/steady pedal
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Terry @ BMS's Avatar
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Default 06-16-2016, 01:32 PM

I made a tweak to the JB4 firmware but need a couple cars who have this issue to test/log it and see if it helps at all. Firmware attached.


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Default 06-16-2016, 06:17 PM

Having the same problem, Tried the new firmware and it did make it better. problem is still there though. I didn't get to log it on the test firmware but here is one on the previous version. Anywhere I can find older firmware and see if that fixes my problem?
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File Type: csv 2016-06-16 19_12_05.csv (15.1 KB, 38 views)
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Default 06-17-2016, 07:35 AM

I have loaded 32_5_TEST3 and its horrible. It jerks the car pretty bad at menu10 on 80. I will send you log later today battery in tablet died.
32_5_TEST2 seemed better for me but not perfect.

Terry how sure are we this is a firmware issue? Are we trying to mask bad WG performance by doing this?


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Default 06-17-2016, 01:25 PM

Here is my test on the new firmware omw to work today.
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File Type: csv 2016-06-17 09_46_26.csv (5.4 KB, 42 views)
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Default 06-17-2016, 05:54 PM

here are some more from my way home.
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File Type: csv 2016-06-17 19_39_42.csv (15.6 KB, 29 views)
File Type: csv 2016-06-17 19_42_01.csv (18.0 KB, 33 views)
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Default 06-18-2016, 05:55 PM

Just had the car carbon cleaned with no effect. Any updates?
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Default 06-18-2016, 07:07 PM

Quote:
Originally Posted by seroga1986
I have loaded 32_5_TEST3 and its horrible. It jerks the car pretty bad at menu10 on 80. I will send you log later today battery in tablet died.
32_5_TEST2 seemed better for me but not perfect.

Terry how sure are we this is a firmware issue? Are we trying to mask bad WG performance by doing this?
A post is useless, only a log would be useful.

No idea if its firmware related or of any of you even have the same actual root cause. If it was firmware related I'd expect everyone to have the issue... Which isn't the case. There is a good chance it has nothing to do with tuning and simply cause by some other mod, failing o2 sensor, something in the back end flash, etc.

Something else to try is the 2EE6 ground wire bypass: http://www.n54tech.com/forums/showthread.php?t=18771


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Default 06-18-2016, 07:42 PM

here is another log after the intake valve cleaning. Possible o2 sensor failing? My AFR's are all over the place.
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File Type: csv 2016-06-18 21_11_58.csv (35.7 KB, 37 views)
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Default 06-18-2016, 08:05 PM

Don't see gas pedal input... Is that on cruise control?


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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.
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Default 06-18-2016, 08:11 PM

Yes cruise control in 6th gear.
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K.Jameel K.Jameel is offline
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Default 06-19-2016, 05:24 AM

here is another two logs one with DWP=0 and other one after the test firmware, no change still the same issue.
Attached Files
File Type: csv 2016-06-19 03_31_25 DWP=0.csv (27.9 KB, 31 views)
File Type: csv 2016-06-19 04_42_18 Test Firmware.csv (34.9 KB, 37 views)


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Default Throttle oscillations at 5% throttle - 06-20-2016, 05:44 AM

Hi all,

I'm attaching a log which shows throttle oscillations at a stead pedal of 300 (5%?). Throttle jumps between 150 and 750 repeatedly resulting in a shaking car. I can also feel it as I lift off the throttle. There is usually 1 or 2 violent shakes before it settles. This can't be good for my engine mounts and subframe bushings



I'm back end flashed using MHD with the linear pedal.
Attached Files
File Type: csv 2016-06-17 16_32_52.csv (73.8 KB, 35 views)



E90 335xi 6MT - Deep Green

Last edited by cmg5461; 06-20-2016 at 05:58 AM..
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Default 06-20-2016, 06:14 AM

I think most people are going to say "have you verified your menu 10, 11 and 12 settings".

DEFAULT SETTINGS:
Menu 10: 3000RPM
Menu 11: 1000RPM
Menu 12: 2800RPM

Below is info from previous posts:

"Menu 10 is used for wastegate Position. (Wastegate rattle)
Menue 11 Pedal input, how agressive you want your pedal feedback. Higher=More touchy
Menu 12, Base duty cycle. Should be within 2400-2800RPM. To high, To low will cause oscillation and strange behavior."
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Default 06-20-2016, 06:25 AM

Quote:
Originally Posted by JayJ
I think most people are going to say "have you verified your menu 10, 11 and 12 settings".

DEFAULT SETTINGS:
Menu 10: 3000RPM
Menu 11: 1000RPM
Menu 12: 2800RPM

Below is info from previous posts:

"Menu 10 is used for wastegate Position. (Wastegate rattle)
Menue 11 Pedal input, how agressive you want your pedal feedback. Higher=More touchy
Menu 12, Base duty cycle. Should be within 2400-2800RPM. To high, To low will cause oscillation and strange behavior."
10/11/12 are fine. This is happening off boost. PWM is constant.

Menu 12 is at 2300. Anything higher than that, I run 4psi boost at cruise speeds.



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Default 06-20-2016, 06:11 PM

@terry
I done the 2EE6 ground wire bypass same issue, any thoughts!!?
Else i will flash back to stock and take the JB4 off and go from there. The jerking and oscillation became annoying.


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Default 06-21-2016, 10:12 AM

Not really sure...have you tried a standard OTS BMS flash just to verify that's not related to the issue?



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Default 06-21-2016, 11:15 AM

Yes, it's the stock BMS backend transferred to my specific BIN. The only thing I have modified is MT bog parameters. Flashed using MHD.



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Default 06-21-2016, 11:25 AM

I can do this all day long haha. Always happens between 0-6% pedal. Oscillates between 2 and 10% throttle. This literally makes the car undrivable



I'm using stock menu 10/11/12 here.

Not sure where to go from here.
Attached Files
File Type: csv 2016-06-20 16_33_25.csv (64.9 KB, 29 views)



E90 335xi 6MT - Deep Green

Last edited by cmg5461; 06-21-2016 at 11:42 AM..
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Default 06-21-2016, 12:29 PM

Does it happen on the stock flash?
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Default 06-21-2016, 12:50 PM

Quote:
Originally Posted by Vorsprung_CJB
Does it happen on the stock flash?
I can test it, but not looking forward to the 2 40 minute flashes

I'm going to try updating my firmware to 32.4 first. I'm on 32.1 now.

Actually stock flash might not be 40 minutes since I'm using my stock bin with BMS values.. I'll check later today



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Default 06-21-2016, 01:03 PM

Quote:
Originally Posted by cmg5461
Not sure where to go from here.
Seems electrical. Try the ground change linked in this post?


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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.
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Default 06-21-2016, 04:00 PM

Quote:
Originally Posted by Terry @ BMS
Seems electrical. Try the ground change linked in this post?
Reflashed without exhaust burble and Mt shift bog option checked (using my own shift bog changes)

Seems like the issue has vanished



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Default 06-21-2016, 04:49 PM

Had a similar issue with mine that got to the point it was making the car buck. Ended up being my o2 sensors. Car runs perfectly smooth now. I can't read your logs though Serge, so I can't tell you if that is your problem too. Mine developed a large variance between the two banks and would bounce around.


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Default 06-22-2016, 03:47 AM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Not really sure...have you tried a standard OTS BMS flash just to verify that's not related to the issue?
sorry but i did not understand, i did flash my car with MHD JB4 map via OTG cable of the mobile and selected the option of kickdown delete.
What do you mean standard OTS BMS flash ? is that MHD option before flashing ?.

Thanks.


BMW 335i '08 E92 N54, JB4 G5 IOS, BMS DCI, VRSF ***, BMS-Tial BOV Kit with Chargepipe, VRSF FMIC, BMS Meth Kit, JB4 MHD BEF, BMS PCV valve, BMS OCC. TCU Alpina_B3 Flash, .

Last edited by K.Jameel; 06-22-2016 at 04:16 AM..
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Default 06-22-2016, 08:51 AM

OTS = Off The Shelf without modifications.



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Video of our Stage 2 LPFP upgrade installation.

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