X5M Stalling on Starting

WNM55 · 05-29-2024, 03:54 AM

Hi,
I have a 2010 E70 X5m. When I start the car it revs up to 1000rpms then it dies. I start the car again and it revs up again then dies and then it gradually revs again .It does this 4 or5 times. Once it is going it is fine and doesn't miss a beat. Can someone tell what they think it is.
Regards William

Colodano · 06-01-2024, 10:47 AM

Any codes?
Sounds like it is losing fuel pressure when it sits, and the in tank pump has to build pressure again.

HtownBlue · 06-01-2024, 04:44 PM

Surging usually is a result of a fuel or air imbalance on all or one cylinder. Sounds like the engine is hunting for its idle speed based on parameter input. I would check for vacuum leaks and pull codes to see if you are running rich or lean. Also I would bet when the car is warm and not in closed loop it doesn’t do this at all or as much.

05-29-2024, 03:54 AM	#1
WNM55 Registered 0 Rep 1 Posts Drives: BMW X5m E70 2010 Join Date: May 2024 Location: Gold Coast Queensland Australia iTrader: (0)	X5M Stalling on Starting Hi, I have a 2010 E70 X5m. When I start the car it revs up to 1000rpms then it dies. I start the car again and it revs up again then dies and then it gradually revs again .It does this 4 or5 times. Once it is going it is fine and doesn't miss a beat. Can someone tell what they think it is. Regards William
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06-01-2024, 10:47 AM	#2
Colodano First Lieutenant 137 Rep 317 Posts Drives: 2010 X5M Join Date: Oct 2017 Location: Co iTrader: (0)	Any codes? Sounds like it is losing fuel pressure when it sits, and the in tank pump has to build pressure again.
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06-01-2024, 04:44 PM	#3
HtownBlue Enlisted Member 16 Rep 32 Posts Drives: 2013 BMW X5 35i Join Date: Jan 2020 Location: Houston iTrader: (0)	Surging usually is a result of a fuel or air imbalance on all or one cylinder. Sounds like the engine is hunting for its idle speed based on parameter input. I would check for vacuum leaks and pull codes to see if you are running rich or lean. Also I would bet when the car is warm and not in closed loop it doesn’t do this at all or as much.
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