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ecarver2's Avatar
ecarver2 ecarver2 is offline
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Posts: 28
Join Date: Aug 2015
Car: 2016 BMW 340i xDrive M-Sport
Default Help! MHD+JB4 Map7 Logs 👉**** Show - 05-08-2019, 05:33 AM

Hey Gang!

I hope to get some guidance on my Post-MHD/JB4BEF Settings I just MHD flashed my b58 with a JB4 BEF (ver.58/13/5 -- Map 7) and also flashed the TCU with x-hp (Stage 3).

I must be having substantial issues with my WMI and User-adjustable settings because I am experiencing the following:
  • Both transient & WOT are jerky—feels like throttle closures and I can hear the BOV opening when it happens.
  • Meth initiation is not consistent—sometimes it comes in on the gear (2nd) that I start logging, sometimes it doesn’t.
  • I can't maintain target boost
  • AFRs are dropping enough to sometimes trigger a 118002 error "Mixture too rich"
  • Overall, the car feels just as powerful and smooth as it did before the MHD

FYI:
  • I live in Denver (5,500’ altitude)
  • These issues were not nearly as noticeable before switching to the MHD flash.
  • I have posted 3 WOT logs and 2 Transient Throttle Logs—both conditions are having the same issues but throttle closures are much more apparent on Transient...


2016 340i xDrive M sport Auto with 15K miles. MODS BELOW:
  • MHD & JB4 BEF (Map 7)
  • x-hp TCU FLash (Stage 3)
  • Running e40 (Verified) fuel
  • VRSF ***-less **
  • M Sport exhaust
  • Agency Power intake
  • BMS Stealth Meth kit (100% Meth —> DUAL BM7 Nozzles)
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dRDiesel's Avatar
dRDiesel dRDiesel is offline
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Posts: 239
Join Date: Apr 2018
Car: BMW
Default 05-08-2019, 05:49 AM

Your fuel trims are high and meth isn't kicking on you can only see it pushing 50% halfway through your first log. It should be 100% during WOT.

Did you just install this kit? Recheck everything or it can possibly be a bad FSB. Prime the pump with the app?

Also post your logs in the BEF thread or email them directly to Terry for now: B58 MHD Back End Flash Maps - N54Tech.com - International Turbo Racing Discussion


| 2018 BMW 340i | M-Sport | Track Handling Package |
| Pure Stage 1 | MPE + ER down-pipe | BMS Intake | JB4 + MHD | BMS Meth Kit |
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ecarver2's Avatar
ecarver2 ecarver2 is offline
Established but no O.G.
 
Posts: 28
Join Date: Aug 2015
Car: 2016 BMW 340i xDrive M-Sport
Default 05-08-2019, 07:05 AM

Quote:
Originally Posted by dRDiesel
Your fuel trims are high and meth isn't kicking on you can only see it pushing 50% halfway through your first log. It should be 100% during WOT.

Did you just install this kit? Recheck everything or it can possibly be a bad FSB. Prime the pump with the app?

Also post your logs in the BEF thread or email them directly to Terry for now: B58 MHD Back End Flash Maps - N54Tech.com - International Turbo Racing Discussion
____

RE: Fuel Trims: I see that but I'm not sure how to adjust the settings to lower them and think I need to sort the meth out before I start applying

Re: Meth not kicking in: I've noticed that and think it is pretty weird; the system has been installed for ~9 months and works perfectly [just tested the whole thing].

I will post the logs there now, probably more effective than just emailing to Terry.

Thanks
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Posts: 29,077
Join Date: Jan 2008
Default 05-08-2019, 09:18 AM

Don't need the threads doubled up. Removed this one as you posted in the B58 flash thread already.


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