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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Major missfires after mhd stage 2 fmic map



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      06-20-2016, 06:42 AM   #1
Mumbles123
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Major missfires after mhd stage 2 fmic map

Hi all
Sooo after getting up the courage to use mhd flaser i have come up against some issues

I was initially running a map by a company in uk by evolve. I backed up then re-flashed with the 98 ron stage 2 map. Maximum wastegate rattle fix, and exhaust burble option on 2sec/medium.
Everything was fine for the first 24hrs sounded great pulled hard ect, till i was driving along and came off the gas in 4th one big burble too many and suddenly im getting huge miss fires.
Read my codes any this is whats showing up.

30bb dme digital motor electronics internal failier
29d1/2/0 cyl 5,6,4 missfires
292d missfire in case of tank filling level
2c3c lambda probe 2 not plugged
2d60 fuel mass monitoring

So my guess would be that the barble overfueling has killed my o2 but id like confimation before i go spending £100 on a new one.

Any insight apreciated
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      06-20-2016, 09:18 AM   #2
muncie21
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Try swapping the O2s, the code is only showing one not working.
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      06-20-2016, 10:48 AM   #3
335NJ
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Sounds like what happened to me. DME failure from failed MOSFETs.

30BB/30BA codes are almost always associated with a single bank reporting misfires (4-5-6 in your case). Whether or not the other codes are directly associated with that, I couldn't tell you.

Last edited by 335NJ; 06-20-2016 at 11:47 AM..
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