E70 x5m wont start after jb4 removal

X5msaiyan · 07-16-2020, 10:26 PM

Long story short, I removed the jb4 from my 2011 x5m only to start a huge mess. Now she wont start. I have a few codes showing. I was thinking in the process of removing the jb4 I had accidentely swapped the yellow/white cables from the black connector pin numbers 45 and 17.
I took everything apart swapped them and tried starting it. Still nothing.
Has anyone experienced something similar in the past ? Is it possible the DME took a dump on me if I incorrectly inserted those 2 connectors ?

Any help please.

lagniappe_718 · 07-20-2020, 12:04 PM

I had a kind of similar issue. Cliffs: installed jb4, immediately blew a coil pack (found this part out later) and threw 10 million codes, would start, but horrible misfire, remove jb4, crank no start and lots of codes. back and forth with getting a dme cloned, eventually just started on the orginal dme. Here's my thread on it... https://www.xbimmers.com/forums/show....php?t=1706082

Did you disconnect the battery when you removed the jb4? If not I'd start with that, just disconnect, let it sit for 10 min or so, then try again.

What codes are you getting?

07-16-2020, 10:26 PM	#1
X5msaiyan New Member 0 Rep 5 Posts Drives: 2010 135i, 2013 135i, 2011 x5m Join Date: Mar 2020 Location: MARYSVILLE, WA iTrader: (0)	E70 x5m wont start after jb4 removal Long story short, I removed the jb4 from my 2011 x5m only to start a huge mess. Now she wont start. I have a few codes showing. I was thinking in the process of removing the jb4 I had accidentely swapped the yellow/white cables from the black connector pin numbers 45 and 17. I took everything apart swapped them and tried starting it. Still nothing. Has anyone experienced something similar in the past ? Is it possible the DME took a dump on me if I incorrectly inserted those 2 connectors ? Any help please.
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07-20-2020, 12:04 PM	#2
lagniappe_718 Private 3 Rep 50 Posts Drives: x5m, silverado, 4runner, boats Join Date: Sep 2019 Location: CHS, SC iTrader: (0) Garage List 2011 X5M [0.00]	I had a kind of similar issue. Cliffs: installed jb4, immediately blew a coil pack (found this part out later) and threw 10 million codes, would start, but horrible misfire, remove jb4, crank no start and lots of codes. back and forth with getting a dme cloned, eventually just started on the orginal dme. Here's my thread on it... https://www.xbimmers.com/forums/show....php?t=1706082 Did you disconnect the battery when you removed the jb4? If not I'd start with that, just disconnect, let it sit for 10 min or so, then try again. What codes are you getting? Last edited by lagniappe_718; 07-20-2020 at 12:10 PM.. Reason: added question
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