Can't go above 8psi jb4 with back end flash(log posted)

prowheelie92 · 01-25-2017, 08:21 AM

I got a backend flash installed on my 07 335i and suddenly all of the all of the maps don't work. Maps 1 2 and 5 all push 8psi. Please let me know if you have any clues as to why this is. Thank you

Couldn't upload the file here so I also posted a thread on n54....t

LGCubana · 01-25-2017, 12:28 PM

Did you (1st) update your JB4 to the latest firmware ?

Then from BMS BEF Instructions:

13) After loading the back end flash map set JB4 to mode 4/2 in dash (JB4 firmware v28.7 and newer). This tells the JB4 to use higher than normal boost targets for each of its maps. Map 1 is 15psi, Map 2 is 17psi, and Map7 is 19psi. All other maps (3, 4, 5, 6) are unchanged and can also be used.

01-25-2017, 08:21 AM	#1
prowheelie92 Private First Class 10 Rep 132 Posts Drives: bmw 335i Join Date: Feb 2014 Location: new jersey iTrader: (0)	Can't go above 8psi jb4 with back end flash(log posted) I got a backend flash installed on my 07 335i and suddenly all of the all of the maps don't work. Maps 1 2 and 5 all push 8psi. Please let me know if you have any clues as to why this is. Thank you Couldn't upload the file here so I also posted a thread on n54....t __________________ Sold: CBR 600 F4i, 1991 BMW 323ci Garage: E90 335I, E39 m5
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