G80 M3 6MT long crank start issue

Drno690 · 10-29-2023, 02:53 AM

Hi guys I recently purchased a 2024 M3 6MT. The car drives perfectly except for one problem which is that sometimes upon starting the car I notice a long crank before it starts. It never happens when I turn off the car and start it again though so only if I leave the car for a while and come back but only occasionally as well. The car drives perfectly fine otherwise. If you guys have any idea what could be wrong please let me know.

Here is the video of the start: https://youtube.com/shorts/j_bApd5eM...4LAiMNwSbkSMwj

geko29 · 10-29-2023, 07:30 AM

Hard to tell from the video, but it sounds like fuel delivery. The car is having no trouble cranking at all, just doesn't fire. Do you hear the fuel pump pressurize when you unlock the doors?

Regardless, you need to take it to the dealer. I'd advise doing an end-of-day or after hours dropoff, so that it has to sit there overnight before they look at it. Be specific with the service advisor that you want the tech to start the car and pull it in, not a porter.

Adcampo · 10-29-2023, 05:21 PM

That ain’t right. Dealer!

BryanCO · 10-29-2023, 08:02 PM

Agree, doesn’t seem normal. Might ask the dealer (or a different dealer) if there is a spec for start time.

Needsdecaf · 10-30-2023, 07:55 AM

Whole thread on this here:

https://g80.bimmerpost.com/forums/sh...ighlight=start

Shaneartistry · 10-30-2023, 07:59 AM

I experienced the same exact thing on my 6MT when it had a couple hundred miles on it.

Took it to the dealership a couple times, they couldn’t find any issues.

It ended up going away on its own after a week or two.

Other folks who had similar issue had spoiled spark plugs due to a bad fuel injector. I’d start looking there.

10-29-2023, 02:53 AM	#1
Drno690 Registered 0 Rep 3 Posts Drives: BMW M3 Join Date: Oct 2023 Location: Los Angeles iTrader: (0)	G80 M3 6MT long crank start issue Hi guys I recently purchased a 2024 M3 6MT. The car drives perfectly except for one problem which is that sometimes upon starting the car I notice a long crank before it starts. It never happens when I turn off the car and start it again though so only if I leave the car for a while and come back but only occasionally as well. The car drives perfectly fine otherwise. If you guys have any idea what could be wrong please let me know. Here is the video of the start: https://youtube.com/shorts/j_bApd5eM...4LAiMNwSbkSMwj
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10-29-2023, 07:30 AM	#2
geko29 Major 1568 Rep 1,424 Posts Drives: 2023 M3 6MT Join Date: May 2012 Location: Illinois, USA iTrader: (2)	Hard to tell from the video, but it sounds like fuel delivery. The car is having no trouble cranking at all, just doesn't fire. Do you hear the fuel pump pressurize when you unlock the doors? Regardless, you need to take it to the dealer. I'd advise doing an end-of-day or after hours dropoff, so that it has to sit there overnight before they look at it. Be specific with the service advisor that you want the tech to start the car and pull it in, not a porter. __________________
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10-29-2023, 05:21 PM	#3
Adcampo Lieutenant Colonel 885 Rep 1,663 Posts Drives: G80 Manual Join Date: Apr 2013 Location: Ashburn Va iTrader: (1)	That ain’t right. Dealer! __________________ 18' F80 6MT, 991.1s cab PDK, F83 6mt, 996 C4S cab 6mt, F30 328iM 6mt E60 M5 SMG, E39 M5, E46 M3 cab 6mt, E36 M3 5mt
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10-29-2023, 08:02 PM	#4
BryanCO Captain 896 Rep 755 Posts Drives: E92 M3 997.1 GT3 G80 Manuals Join Date: Apr 2019 Location: Colorado Springs iTrader: (0)	Agree, doesn’t seem normal. Might ask the dealer (or a different dealer) if there is a spec for start time.
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10-30-2023, 07:55 AM	#5
Needsdecaf Major General 6626 Rep 6,713 Posts Drives: 2024 G80 Comp xDrive Join Date: Feb 2011 Location: The Woodlands, TX iTrader: (0)	Whole thread on this here: https://g80.bimmerpost.com/forums/sh...ighlight=start
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10-30-2023, 07:59 AM	#6
Shaneartistry Lieutenant 507 Rep 504 Posts Drives: BMW X5 Join Date: Jul 2022 Location: TN iTrader: (0)	I experienced the same exact thing on my 6MT when it had a couple hundred miles on it. Took it to the dealership a couple times, they couldn’t find any issues. It ended up going away on its own after a week or two. Other folks who had similar issue had spoiled spark plugs due to a bad fuel injector. I’d start looking there.
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