No Boost: 3100 code, 30CF, 30D0

swollix · 08-08-2016, 03:22 PM

So a few days ago I upgraded to the JB4 G5 board. (car came with G4) I didn't switch anything but the board only , didn't undo harness. The board is brand new from Burger. After install the car went into half engine mode and threw the codes 3100, 30CF, 30DO. I drove around a few days and it didn't go away. So I went over to a knowledgeable buddy's house who DIY'ed his own single turbo setup. Spent two hours with buddy trying to figure it out, checked vacuum lines, swapped in his boost solenoids, swapped in his TMAP, updated firmware, swapped in his g5, put g4 back on, removed JB4 completely. Even when returned to stock, the car still won't boost. Wastegates are completely open, there is 0 boost and it is much slower than stock. After all this we cleaned up the tools and I left and the car was boosting fine! I drove all the way home (25 miles) without any hiccups. When I got back home I put the G5 back in and now I am back at square one.

Any ideas?

BeastMode335i · 08-08-2016, 04:26 PM

Seems kinda weird because u said the problem persisted even after removing the JB4 but when I googled those codes, pretty much every link that popped up was in reference to JB4 lol.. Sorry I can't help you more bro but I'd imagine it was a JB4 or wiring related issue.. If you swapped boost solenoids and that didn't fix it perhaps it's more of a connection issue than an actual sensor issue..

swollix · 08-08-2016, 09:53 PM

All is good, Terry got me squared away! Thanks

djTLC · 05-08-2017, 05:12 PM

Quote:

Originally Posted by swollix

All is good, Terry got me squared away! Thanks

What was it???
@terry I could use some assistance on this one

Gonzo's 335i · 01-11-2019, 05:28 AM

How did you resolve?

08-08-2016, 03:22 PM	#1
swollix Private First Class 40 Rep 114 Posts Drives: 07 335i 6MT Join Date: Sep 2011 Location: United States iTrader: (0)	No Boost: 3100 code, 30CF, 30D0 So a few days ago I upgraded to the JB4 G5 board. (car came with G4) I didn't switch anything but the board only , didn't undo harness. The board is brand new from Burger. After install the car went into half engine mode and threw the codes 3100, 30CF, 30DO. I drove around a few days and it didn't go away. So I went over to a knowledgeable buddy's house who DIY'ed his own single turbo setup. Spent two hours with buddy trying to figure it out, checked vacuum lines, swapped in his boost solenoids, swapped in his TMAP, updated firmware, swapped in his g5, put g4 back on, removed JB4 completely. Even when returned to stock, the car still won't boost. Wastegates are completely open, there is 0 boost and it is much slower than stock. After all this we cleaned up the tools and I left and the car was boosting fine! I drove all the way home (25 miles) without any hiccups. When I got back home I put the G5 back in and now I am back at square one. Any ideas?
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08-08-2016, 04:26 PM	#2
BeastMode335i Maximus Decimus Meridius 1175 Rep 4,654 Posts Drives: F30 335i Join Date: Apr 2014 Location: Down South iTrader: (2)	Seems kinda weird because u said the problem persisted even after removing the JB4 but when I googled those codes, pretty much every link that popped up was in reference to JB4 lol.. Sorry I can't help you more bro but I'd imagine it was a JB4 or wiring related issue.. If you swapped boost solenoids and that didn't fix it perhaps it's more of a connection issue than an actual sensor issue.. __________________ F30 335i Melbourne Red Metallic M-Sport Package
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08-08-2016, 09:53 PM	#3
swollix Private First Class 40 Rep 114 Posts Drives: 07 335i 6MT Join Date: Sep 2011 Location: United States iTrader: (0)	All is good, Terry got me squared away! Thanks
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01-11-2019, 05:28 AM	#5
Gonzo's 335i New Member 3 Rep 15 Posts Drives: 2008 335i Sedan Premium Sport Join Date: Oct 2016 Location: Austin, TX iTrader: (0)	How did you resolve?
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