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      09-23-2012, 01:55 PM   #6
Private First Class
United Kingdom

Drives: 335i e92
Join Date: May 2011
Location: London

iTrader: (0)

Car cranks but doesn't start. Checked for power at power connection where jb4 connects in ecu box area and no power? Got power at the 50amp fuse connection but none on the red wire to jb4 that connects to the orange power connection. Can hear fuel pump under seat making whirring noise with the cover removed. Dont know how to check whether it's working 100% though. I'm confused as to why there wouldn't be power to jb4 though when key in ignition and start button pressed. It normally connects when you update jb4 firmware in this way...