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ntumow ntumow is offline
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Question My LOG file, #6 Cyl misfiringissue - 06-13-2020, 06:01 AM

Hi, I am Albert who asked questions on FB group.
Please kindly check for me. Thank you very much.

attached please find my zipped logs and one screen capture for codes.
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File Type: zip MyJB4LOG_20200612.zip (307.1 KB, 44 views)
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Default 06-13-2020, 06:11 AM

You’ll need to unzip the file.

I can already see it’s massive- please upload a log 2k to redline, WOT, 3rd gear, traction off.

P2aaf is commonly known as a tuner code, however it can correlate to a tired hpfp


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ntumow ntumow is offline
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Default 06-13-2020, 08:01 AM

It should be this file during the engine shows #6 misfiring.
I've deleted the idle rows.
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File Type: csv P32_M7_R3_200612_2153_truncated(show #6 misfiring).csv (27.0 KB, 43 views)
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Default 06-13-2020, 03:39 PM

What are you using for fuel?


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Default 06-13-2020, 05:45 PM

I am in Taiwan using the fuel we call “98”. I’ve checked this is equal to 93 in states.
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Default 06-14-2020, 09:08 AM

Additional info:
I just replaced my LPFP by Fuel-it stage1 pump one week ago.
My HPFP was replaced by a new one less than 10000km ago.
All six ignition coils and spark plugs were changed to ECSTuning package as attached picture shows.

All six injectors were replaced by index 12 in last January.
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Default 06-15-2020, 05:45 AM

Any log?

You’ll want to address your misfire


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Default 06-15-2020, 01:58 PM

The log is in my original post in 6/13, please kindly check upward.
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Default 06-15-2020, 09:30 PM

Quote:
Originally Posted by ntumow
The log is in my original post in 6/13, please kindly check upward.
You’ll need to unzip the file. If too big to unzip, trim the log


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Default 06-17-2020, 07:58 PM

Hi, sorry, II was sick for two days. Here comes the log.
Attached Files
File Type: csv P32_M7_R3_200612_2153_truncated(show #6 misfiring).csv (27.0 KB, 49 views)

Last edited by ntumow; 06-17-2020 at 08:01 PM.. Reason: forget attaching the log & typo
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Default 06-18-2020, 09:04 AM

New issues pop up, help need!!
1. After fast acceleration, there are 3 cylinders misfiring.(as attached picture and log.)
2. During smooth highway driving, the car screen shows "engine malfunction". JB4 reads the code as "30FC Exhaust fume turbo charger, density." I did logged, but cannot find in log list in app.
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File Type: csv P32_M7_R1_200618_truncated.csv (3.7 KB, 40 views)
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Default 06-18-2020, 03:43 PM

Can anyone help?
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Default 06-18-2020, 08:28 PM

MAP 7 is likely too aggressive for your fuel and no Back End Flash tune. Note in the first log your AFR2 hits 20 with throttle at 100%. This will cause misfires and safety MAP 4. Here is what you could try:

- Change to MAP 1
- Enable 6-cylinder timing to allow logging of all 6 cylinders, not just cyl 1
- Log wide open throttle (WOT), traction control disabled, 3rd gear only, 2,000 to redline RPM. The JB4 can be set to auto log at WOT to make it easier.
- post logs back in this thread


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Default 06-19-2020, 07:22 AM

You need to start addressing your misfire issue, or else you’ll never be able to enjoy the car or properly log.

Tuned cars put more stress on the ignition system.

I’d start by moving the coils, see if the miss follows & replace.


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Home of the JB4 the worlds most popular turbocharged tuning system!

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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Icon1 06-22-2020, 08:36 AM

Quote:
Originally Posted by Dave @ BMS/Fuel-It!
You need to start addressing your misfire issue, or else you’ll never be able to enjoy the car or properly log.

Tuned cars put more stress on the ignition system.

I’d start by moving the coils, see if the miss follows & replace.
Yes, thank you for the feedback. I am going to check if the coils & spark plugs are well-installed and feedback to this thread.

I got more cylinders misfiring not only in MAP7, but also in MAP1.

If my coils & spark plugs are well installed.

What conditions should I set when starting log?

I mean MAP#? RPM range? etc,...........

Thank you!
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Default 06-23-2020, 06:04 AM

You’ll want to log map 1-2 to start & bump up based on log feedback.

Installed correctly or not- if the coils are bad, itll misfire regardless.

Fix the misfires


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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 06-24-2020, 08:00 PM

Quote:
Originally Posted by Dave @ BMS/Fuel-It!
You’ll want to log map 1-2 to start & bump up based on log feedback.

Installed correctly or not- if the coils are bad, itll misfire regardless.

Fix the misfires
Hi, Dave,

I had several runs under map0 & map1.

No matter how hard & crazy I drive, no error code appears.
(No misfiring, no fuel issue, no turbo fame issue)

P.S. My car ECU had been modified to 400ps by local mods factory before I install JB4. Thus, does map0 using the 400ps map?

What should I do next?
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Default 06-25-2020, 02:38 AM

What in dash menu setting are you using? The JB4 needs to be told if you are using an ecu flash tune. Also logs.

Quote:
What do menu 4/2, 4/3 and 4/4 in dash do and which one should I select?

Menu4 allows you to tell the JB4 whether you are running on the factory flash tuning (4/3 DEFAULT SETTING), a JB4 back end flash map (4/2), or want to run flash only (4/4) with the JB4 providing gauges and/or boost targeting only.


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Default 06-25-2020, 05:38 AM

Quote:
Originally Posted by dmckmc
What in dash menu setting are you using? The JB4 needs to be told if you are using an ecu flash tune. Also logs.
Thx, I never know this before. I am going to check tonight.
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Default 06-25-2020, 08:32 AM

Quote:
Originally Posted by ntumow
Thx, I never know this before. I am going to check tonight.
Tach set to 4/2 is the right selection


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Home of the JB4 the worlds most popular turbocharged tuning system!

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 06-26-2020, 07:27 AM

Quote:
Originally Posted by Dave @ BMS/Fuel-It!
Tach set to 4/2 is the right selection
I checked the setup. It was 4/2 while I switched to 4.(shown in picture)

Besides, I already have snow performance Ethanol injection StageII in hand. Should install it first?

Water-Methanol Injection Boost Cooler Stage 2 from SNOW - Water Injection - Snow Performance Boost Cooler
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Default 06-26-2020, 07:33 AM

Quote:
Originally Posted by Dave @ BMS/Fuel-It!
Tach set to 4/2 is the right selection
I checked the setup. It was 4/2 while I switched to 4.(shown in picture)

Besides, I already have snow performance Ethanol injection StageII on hand. Should install it first?

Water-Methanol Injection Boost Cooler Stage 2 from SNOW - Water Injection - Snow Performance Boost Cooler
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Default 06-26-2020, 09:47 AM

After last reply, I went to try map5. After rapid acceleration, the car screen show “the engine cannot output full power. Please go to the nearest BMW repair center” and JB4 read the code as “ 30FC Exhaust fume turbo charger, density”

I stop the car and shutdown the engine, then restart it and set to map1. I made a rapid acceleration again. The car screen shows same message again, but no error code appear on JB4.(it may be because I did not clear the code)

I restarted the engine again. No matter how rapid acceleration I made, no code appears.

From these runs during these days, no error code pops up in map0 & map1 from cold start, no matter how bad I drive.

But error code appears in map0 & map1 after error codes appear in map5 or map7.

Please kindly advice what I should do next?

Thank you!
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Default 06-26-2020, 12:40 PM

Quote:
Originally Posted by ntumow
After last reply, I went to try map5. After rapid acceleration, the car screen show “the engine cannot output full power. Please go to the nearest BMW repair center” and JB4 read the code as “ 30FC Exhaust fume turbo charger, density”

I stop the car and shutdown the engine, then restart it and set to map1. I made a rapid acceleration again. The car screen shows same message again, but no error code appear on JB4.(it may be because I did not clear the code)

I restarted the engine again. No matter how rapid acceleration I made, no code appears.

From these runs during these days, no error code pops up in map0 & map1 from cold start, no matter how bad I drive.

But error code appears in map0 & map1 after error codes appear in map5 or map7.

Please kindly advice what I should do next?

Thank you!
We’d need a log of the issue happening in map 5 or 7


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

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 06-28-2020, 06:04 AM

Here is the log.
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File Type: csv 200626_map5_TURBO_FAME.csv (85.6 KB, 37 views)
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