30FF MHD Stage2 logs attached

dr3am3r

New Member
Mar 24, 2019
2
0
0
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BMW 335i
Hi, gents!

The car is E92 335i with N54 full bolt-on, downpipes, cold intake, occ, pretty standard stuff.
Stocks are: low pressure fuel pump, sensors, turbos.

The issue is: when it pulls there are drops in power delivery and after ~5k RPM at some point 30FF pops up with low boost pressure message.
It's been happening for a while, not related to MHD tune, but now I'm able to grap some logs and share them.
Logs are attached with DME errors as well.

I'm leaning towards turbos replacement, but since it's an expensive one want to double-check with specialists.

Thanks in advance!
 

Attachments

  • 2020-02-02 15_25_12 I8A0S v7.1 Stage 2 FMIC 91oct_95ronAT_noALP.csv
    19.2 KB · Views: 32
  • mhd-dme-errors.jpg
    mhd-dme-errors.jpg
    77.1 KB · Views: 42

White Sands

Lurker
May 21, 2019
17
2
0
Ride
BMW e90 335i
30ff means you have a boost leak somewhere, you should first start checking all vacuum lines and IC couplings for anything loose or broken. When I had 30ff it ended up being the top nipple on one of the vacuum canisters had cracked slightly. Just by looking at it you would never be able to tell which is why I would suggest you go over all the vacuum lines and replace any that could potentially be an issue