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sconnell80 sconnell80 is offline
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Car: 2012 BMW 650i
Default 2012 BMW 650i n63 data logging - 10-20-2020, 02:00 PM

Hello new to the JB4 platform and I have been running into some issues recently with the car running rough at idle or at a light and throwing lean and misfire issues. I attached a couple logs one which is map 0 and one that is map 2. Neither map will help the car run like it was a couple weeks ago. I did find that one of my plastic intake tubes that has the single bolt holding it to the turbo inlet was cracked and the orange seal was showing and possibly slid back sucking in unfiltered air. Iíve checked all hose connections and all look tight and in place. I recently installed catch cans on both banks and was in need of replacing the plastic pcv hoses with rubber hoses going to the catch cans. I didnít have any of these issues until I installed these and Iím hoping they arenít the culprit as they are doing their job keeping out the moisture/oil/fuel combo. The car has brand new NGK one step colder plugs, arm intake, arm dpís, bmw 3.5 TMAPS and of course the JB4. Like I said car was running great and making good power with the occasional misfire which is normal Iíve heard for the N63. Hopefully these logs will help explain whatís going on or shed some light on what I can do and also help tune the car for maximum performance. Thanks in advance guys.
Attached Files
File Type: csv P63_M0_R1_201020_1619.csv (202.7 KB, 14 views)
File Type: csv P63_M2_R2_201020_1604.csv (216.6 KB, 12 views)


2012 BMW 650i M Sport-Arm Motorsports C***** down p***, Arm Motorsports front mount intake, JB4 with Bluetooth, BMW 3.5 TMAPS, colder ngk plugs dual oil catch cans, and the list will continue

2013 BMW X5 M Sport-VRSF c******* down pipe, BMS intake, BMS charge pipe, MHD Tuning and the list will continue
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 10-20-2020, 02:29 PM

The map0 log shows normal WOT operation, but logs won't be useful for troubleshooting a rough idle. You'll want to start removing obvious possible causes like intake, exhaust mods, etc, if nothing stands out in the fault codes.
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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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sconnell80 sconnell80 is offline
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Default 10-20-2020, 02:35 PM

The thing is it’s not rough idle all the time. Everything was good till I installed the catch cans and used rubber hose to the catch cans and I also wanted to replace the brittle and cracked plastic pcv hoses that I had taped up to prevent vacuum leaks. All the other add on’s where doing great so I don’t think there were any issues there. I also attached map 2 log how did that look? Is there a certain way to do logs so I can get you the best possible info? I’d like to get the best performance out of the car obviously after I figure out why I’m getting lean mixture code 118001 and the misfire codes which I believe are caused by the same issue. Thanks for your help Terry.


2012 BMW 650i M Sport-Arm Motorsports C***** down p***, Arm Motorsports front mount intake, JB4 with Bluetooth, BMW 3.5 TMAPS, colder ngk plugs dual oil catch cans, and the list will continue

2013 BMW X5 M Sport-VRSF c******* down pipe, BMS intake, BMS charge pipe, MHD Tuning and the list will continue
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Default 10-20-2020, 03:09 PM

Maybe it's as simple as vacuum or PCV line leak somewhere? hard to really know.


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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