So what happens if I do this...

james1986_135i · 06-12-2017, 04:51 PM

Basic and stupid noob question.

I have a n54 with a flash tuned ECU through a tune house

I have more bolt on parts and want to install a JB4 and just run FBO on map 2 setting.

Does this cause problems? and Do I need to reset the ECU to baseline the parameters prior to installing the JB4 and simply running the map.

Just looking for straight answer - don't flame me.

cheers

BimmerAg · 06-12-2017, 05:16 PM

If you want to install a JB4, then yeah you should flash back to the stock map. Another option would be to get a new flash tune that will take advantage of your new mods. Both approaches will yield basically the same results.

xQx · 06-12-2017, 05:33 PM

You will want to re-flash your ECU with a JB4 backend-flash to take full advantage of the JB4.

Running a JB4 map on top of a non-JB4 tuned backend flash can yield strange results.

Alternatively, you can configure the JB4 to run in 'gauges only mode', where it does no tuning and leaves the tuning entirely to your backend flash.

06-12-2017, 04:51 PM	#1
james1986_135i Enlisted Member 7 Rep 30 Posts Drives: bmw 135i Join Date: Jun 2017 Location: Adelaide iTrader: (0)	So what happens if I do this... Basic and stupid noob question. I have a n54 with a flash tuned ECU through a tune house I have more bolt on parts and want to install a JB4 and just run FBO on map 2 setting. Does this cause problems? and Do I need to reset the ECU to baseline the parameters prior to installing the JB4 and simply running the map. Just looking for straight answer - don't flame me. cheers
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06-12-2017, 05:16 PM	#2
BimmerAg Lieutenant 425 Rep 545 Posts Drives: 2011 135i Join Date: May 2017 Location: San Antonio, TX iTrader: (0)	If you want to install a JB4, then yeah you should flash back to the stock map. Another option would be to get a new flash tune that will take advantage of your new mods. Both approaches will yield basically the same results. __________________ 2011 BMW 135i ///M-Sport, DCT Bilstein B12 kit, Dinan camber plates, M3 front control arms, Whiteline poly RSFB, MHD Stage 1, cp-e Charge Pipe, H&R Front sway bar, BMW performance diffuser
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06-12-2017, 05:33 PM	#3
xQx General 903 Rep 1,003 Posts Drives: 2008 BMW 135i (E88 N54 6AT) Join Date: Aug 2016 Location: Sunshine Coast QLD Australia iTrader: (0)	You will want to re-flash your ECU with a JB4 backend-flash to take full advantage of the JB4. Running a JB4 map on top of a non-JB4 tuned backend flash can yield strange results. Alternatively, you can configure the JB4 to run in 'gauges only mode', where it does no tuning and leaves the tuning entirely to your backend flash.
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