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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > JB4 + BM3 = CEL and warnings?
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      07-13-2018, 11:59 PM   #1
nikhil1423
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JB4 + BM3 = CEL and warnings?

Hi guys, I recently added BM3 for some more power after enjoying JB4 for 3 years. The intent was to run the stack of both that so many of you enjoy.

However, I now have a CEL along with a couple of drivetrain warnings (one for fuel system and one for dt mf). The car pulls hard but I can tell it's not full power and its running rich.

Has anyone else had these issues? How can I resolve it? Any info helps, thanks!
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      07-14-2018, 03:16 AM   #2
MTWO
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No point in JB4 honestly. I sold mine the moment I felt how smooth and strong OTS map felt in comparison.
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      07-14-2018, 10:58 AM   #3
_bdiddyb_
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"fuel system and dt mf" is resolved by doing an "online recode", unless you have other codes.
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      07-14-2018, 12:12 PM   #4
nikhil1423
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What's an online recode?
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2014 Mineral Grey 335xi ZMM, ZPP, ZCW, ZDA, ZTP.
Performance: FBO; MPE, Brembo M BBK, ER CP, ER DP, Phoenix IC, JB4, KW V2, Mechunik Front Tower Strut Brace, Michelin PS AS3+, JL Audio W6 10" HO sealed/ported box, and a bunch of other stuff you probably don't care about either.
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      07-15-2018, 12:00 AM   #5
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Quote:
Originally Posted by nikhil1423 View Post
What's an online recode?
Button right under the flash button
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      Yesterday, 12:59 AM   #6
maxio
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Quote:
Originally Posted by nikhil1423 View Post
Hi guys, I recently added BM3 for some more power after enjoying JB4 for 3 years. The intent was to run the stack of both that so many of you enjoy.

However, I now have a CEL along with a couple of drivetrain warnings (one for fuel system and one for dt mf). The car pulls hard but I can tell it's not full power and its running rich.

Has anyone else had these issues? How can I resolve it? Any info helps, thanks!
Is your BM3 off the shelf (OTS) map, or custom tuned on top of the JB4? I'm considering doing the same combo, running JB4 Map 5 right now.
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